How did the Emancipation Proclamation have an effect on African American’s ability to serve in the Union army?

Question

Responses
A As a result of the proclamation, African Americans were no longer drafted into service for the Civil War.As a result of the proclamation, African Americans were no longer drafted into service for the Civil War.
B As a result of the proclamation, the end of the war came quickly, so African Americans were not able to mobilize efforts to join the fight.As a result of the proclamation, the end of the war came quickly, so African Americans were not able to mobilize efforts to join the fight.
C As a result of the proclamation, African Americans were provided full citizenship rights, which included the ability to join the war effort.As a result of the proclamation, African Americans were provided full citizenship rights, which included the ability to join the war effort.
D As a result of the proclamation, tens of thousands of African Americans from the South flooded to areas controlled by the Union to join the Union army.As a result of the proclamation, tens of thousands of African Americans from the South flooded to areas controlled by the Union to join the Union army.

Answer 1

D As a result of the Emancipation Proclamation, tens of thousands of African Americans from the South flooded to areas controlled by the Union to join the Union army. This allowed African Americans to actively serve in the war effort and contribute to the Union's military strength.