Arriving in June 1917,the First African-American Military Personnel to Reach

Arriving in June 1917,the first African-American military personnel to reach the war zone were tasked with

A) building roads,digging trenches,and unloading supplies.
B) replacing exhausted European infantry soldiers on the front lines.
C) creating a new front against the German army in northern France.
D) manning the new tank regiments which Britain had just put on the field.