询问一道主旨题
28864
Following the United States Civil War(1861-1865), many former slaves in the rural South became sharecroppers (raising a landlord’s crop for a share of the profits) or tenant farmers(selling what they raised and paying a share of the profits as rent). Most historians tend to depict these African American rural reformers as Robert Lloyd Smith, founder of the Farmers’ Improvement Society of Texas, and Joseph Elward Clayton, the first African American to organize farmers’ institutes for the Texas Department of Agriculture, as anti-racists. Both men advocated comfortable homes and better schools for African Americans, both attributed poverty and illiteracy to causes other than racism, such as insect damage to crops, and both worked to keep Black farmers on the land, although Smith opposed farm tenancy system on Black farmers and of accommodating racism. While the extent of these reformers’ influence requires more study, their organizations provided a voice for African American farmers seeking to improve their positions in the agrarian South.
1. The passage is primarily concerned with
A. restoring the reputations of two reformers whose accomplishments have long been denigrated by historians
B. refuting criticism of two reformers made by their contemporaries by demonstrating that those criticisms are baseless
C. providing evidence to support a claim that historians’ understanding of a particular phenomenon may be incomplete
D. discussing some of the reasons that two reformers who were well-known during their lifetimes are considered by historians today to have been ineffective
E. suggesting an alternative interpretation of the effect of the farm tenancy system on the economy of the rural South following the Civil War
这一题答案选C，虽然别的答案看起来都不对C还稍微合理一些但是还是不太懂。
每次都是错主旨题真的很无奈啊，努力去把握全文但是有的时候还是不行。
不知道哪位大神可以帮忙讲解一下这道题。
关于文章还有一句话没有看太懂，Both men advocated comfortable homes and better schools for African Americans, both attributed poverty and illiteracy to causes other than racism, such as insect damage to crops, and both worked to keep Black farmers on the land, although Smith opposed farm tenancy system on Black farmers and of accommodating racism. 这句话里，为什么到最后出现一个although。在这里如何解释？
谢谢谢谢
1. The passage is primarily concerned with
A. restoring the reputations of two reformers whose accomplishments have long been denigrated by historians
B. refuting criticism of two reformers made by their contemporaries by demonstrating that those criticisms are baseless
C. providing evidence to support a claim that historians’ understanding of a particular phenomenon may be incomplete
D. discussing some of the reasons that two reformers who were well-known during their lifetimes are considered by historians today to have been ineffective
E. suggesting an alternative interpretation of the effect of the farm tenancy system on the economy of the rural South following the Civil War
这一题答案选C，虽然别的答案看起来都不对C还稍微合理一些但是还是不太懂。
每次都是错主旨题真的很无奈啊，努力去把握全文但是有的时候还是不行。
不知道哪位大神可以帮忙讲解一下这道题。
关于文章还有一句话没有看太懂，Both men advocated comfortable homes and better schools for African Americans, both attributed poverty and illiteracy to causes other than racism, such as insect damage to crops, and both worked to keep Black farmers on the land, although Smith opposed farm tenancy system on Black farmers and of accommodating racism. 这句话里，为什么到最后出现一个although。在这里如何解释？
谢谢谢谢
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