During WW2, the US armed forces were mostly segregated. Hence the correct answer is D. It is to be noted that this segregation was required by the US congress.
What ended the segregation in the US Army?
The segregation in the US army was ended by Executive Order 9981.
The executive order was issued on the 26th day of July, 1948 by President Harry Truman.
It abolished discrimination due to color, race, religion, or national origin. Before that order, the US army was largely segregated.
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