All of the following were threats to the Qin dynasty EXCEPT

d. she conquered the black sea coast and parts of poland.

many women had to remain at home while husbands found work.

explanation:

music

explanation:

on april 6, 1917, the u.s. joined its allies--britain, france, and russia--to fight in world war i. under the command of major general john j. pershing, more than 2 million u.s. soldiers fought on battlefields in france.