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:

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

d. china

good luck

d is the best choice