There are four amendments to the constitution about who can vote

Amendment XXVI - Right to Vote at Age 18 (1971),  Amendment XIX - Women's Right to Vote (1920),    Amendment XV - Rights Not to Be Denied on Account of Race (1870)

Explanation:

answer; ///i believe the correct answer is (b) the writing of the ancients who lived in india after the indus valley inhabitants died out;

world bank is the correct answer.