There are several important constitutional issues at the start of Reconstruction, but perhaps the greatest was if the newly freed slaves could be counted as citizens.
In 1860,Abraham Lincoln was elected as U.S. president but his election was accepted by many southern states who decided to secede from the U.S. and form the Confederate States Of America with 6 other states(and eventually 11 all together)
cause-Lincoln had only won the election with 40% of the popular vote,which meant that the majority of the country did not support his ideals-especially anti-slavery sentiment.
Society began to crumble and people abandoned their homes and moved east
Answer:

Explanation:
After the Civil War and 13th Amendment, slavery was abolished from the United States. This left 4 million former slaves or freedmen to fend for themselves while looking for jobs, homes, and educations during the period of Reconstruction.
The Freedmen's Bureau was created by the government to help the freedmen transition. They helped tons of former slaves through meals, healthcare, labor contracts, and the building/funding of schools and colleges.
They attempted to redistribute land (choice C) but most efforts were unsuccessful and it wasn't the main purpose. It was not created for suffrage (choice B) or to help prospective politicians (choice D). This leaves choice A as the best answer.
The answer is D hope this helps.