WAC
what was it and what was it's significance.

Women's Army Corps (WAC), U.S. Army unit created during World War II to enable women to serve in noncombat positions. Never before had women, with the exception of nurses, served within the ranks of the U.S. Army

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

c 3 branches because idk why they had 3 well when:

you think of it there are still contrys with 3