The Composition of the Roman Army Eventually Created Problems for the Roman

The composition of the Roman army eventually created problems for the Roman Empire including

A) Soldiers who were prisoners tended to escape depleting the ranks of the army.
B) Soldiers who were slaves used their weapons on their owners.
C) The use of mercenaries meant the army became more expensive to maintain.
D) The difficulties of recruiting new soldiers meant the army became smaller and less efficient.