Andrew johnson assumed responsibility for reconstruction after

a. congress passed the fifteenth amendment.

b. carpetbaggers and scalawags undermined the efforts of the freedmen’s bureau.

c. southern democrats agreed to the compromise of 1877.

d. john wilkes booth assassinated president lincoln.

D.John Wilkes Booth assassinated President Lincoln.

Explanation:

Andrew Johnson, served as vice president, at the time that John Wilkes Booth assassinated President Lincoln. It is for this reason that Johnson took Lincoln's place as President of the nation, and one of his main concerns in his four years of presidency was to carry out the Reconstruction process, which led him to star in a political trial.

a.that is my answer.

brainliest .

i'm not certain but i'm pretty sure it was spanish and portuguese america.