Which factor contributed to planters using enslaved africans as a labor source?
select the best answer from the choices provided.
a. caribbean plantations grew larger.
b. the european economy improved.
c. england entered the atlantic slave trade.
d. more laborers arrived from europe.

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).

the answer is aggresion hope this and mark me as brainiest and add me as friend