The correct answer is C: Women were extended the right to vote before African American males.
According to the text, African American males were granted voting rights with the Fifteenth Amendment after the Civil War, while women did not receive the right to vote until the Nineteenth Amendment was passed in 1920. Thus, the timeline shows that women were granted the right to vote later than African American males, making option C the most accurate statement regarding the relationship between the two groups' voting rights.