Which of the following best explains a result of the developments described in the excerpt?
A. African Americans entered the military because they could not find employment owing to the Great Depression.
B. Many African American men preferred to remain as sharecroppers rather than enlist in the military.
C. New employment opportunities opened up for African Americans in industrial and defence industries.
D. The United States government allowed African American enlistment only after the attack on Pearl Harbor.
New employment opportunities opened up for African Americans in the industrial and defence industries.