How was the Constitution significant in helping African Americans to gain civil rights?

A) Reconstruction-era Presidents passed executive orders guaranteeing equal rights.
B) African Americans challenged laws and customs that violated their constitutional rights.
C) The NAACP wanted to establish an entirely new Constitution to better protect minority rights.
D) President Truman encouraged the public to ignore the Constitution in terms of minority rights.

It's A because past presidents had their say in the constitution and the constitution has rvolved over time granting everyone equal rights.

Explanation:

jim crow law, in u.s. history, any of the laws in which racial was enforced, in the south between the finish of reconstruction in 1877 and the start of the social liberties development during the 1950s.

jim crow was the name of a minstrel routine( jump jim crow) performed starting in 1828 by its creator, thomas dartmouth ("daddy") rice, and by numerous imitators, including on-screen character joseph jefferson.

the term came to be a defamatory sobriquet for african americans and an assignment for their segregated life. the segregation rule was stretched out to parks, graveyards, theaters, and eateries with an end goal to keep any contact among blacks and whites as equivalents.

it was classified on neighborhood and state levels and most broadly with the "separate yet equivalent" choice of the u.s. preeminent court in plessy v. ferguson (1896).