which group was most affected by the passage of the fifteenth amendment?\no african americans\no african…

Brief Explanations:

The Fifteenth Amendment to the U.S. Constitution prohibited the federal and state governments from denying a citizen the right to vote based on that citizen's "race, color, or previous condition of servitude." It specifically targeted African - American males of voting age, as it was aimed at giving them the right to vote. African - American females were not directly affected as the amendment was about male suffrage at that time, and the term "African Americans of voting age" is too general without specifying gender.

Answer:

B. African American males of voting age