I believe it was A, if I'm not mistaking.
Women are treated very strictly under the Sharia Law. They should be covered fully in the black veils and are not allowed to go outside home without the company of male family members including father, husband, brother. This also forbids women from driving or meeting any male friend.
The name of the river that marked the northern boundary of Islamic expansion in central Asia is Oxus. In 651, Arabs took Iran. After this, they went towards the Oxus river in the north with the intention of defeating the Turkish. The Arabs succeeded and the expansion setling Oxus river as the northern boundary was finally consolidated in 750 C.E.
The 15th Amendment to the Constitution granted African American men the right to vote by declaring that the "right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of race, color, or previous condition of servitude.
source: Library of Congress
It led to debt for farmers but not landowners