What do you recall about social changes that came about during the era of reconstruction?

Jan 3, 2020 — Reconstruction amendments As most students do learn, the U.S. gained three constitutional amendments that extended civil and political rights to newly freed African Americans following the Civil War. The 13th, ratified in 1865, banned slavery and involuntary servitude except for the punishment of a crime.

d and a is the correct anwsers

explanation:

it allows shippers to carry commercial goods, which allows them to save time and money.