The Main Issue That Arose with the Soldiers Who Volunteered

The main issue that arose with the soldiers who volunteered for the U.S.Army during the Spanish-American War was that

A) they could not read or write.
B) they had tremendous animosity toward Cubans.
C) most of them were afraid to face combat situations.
D) the army often failed to properly train and equip them.
E) they were clearly outmanned by the Philippine Army.