I think the answer might be e and also be but I'm not sure but please let me know if I'm wrong
"internal problems unification among Islam in Northern Africa and Western Europe".
It would be A or D depending.
A if you are talking about the 1910's-20's. The war lead to some rapid growth in the military and made the USA into the central hub of trade in west as many nations were indebted to them.
D as this was the first time the USA became the global power as they took control of Cuba, Guam and the Philippines in this time.
Answer: They fought because if they didn't, they would just be back in slavery. At the time they were in slavery. They gave them an offer to fight and not work.
Explanation:
