I believe the answer is ships
The answer is gonna be (D) Tyrant
He was a scholar who wrote to defend religious ideals. The Great Schism of 1378 differed from the one in 1054 because. it was based on a power struggle.
Humans must have external constraints in order to live together
Many former slaves still were unedumercated and needed to find jobs this lead to a legal form of work known as share cropping (tending to crops for a portion of the crop or a low wage pay)