to protect its frontiers, the roman empire depended on mercenaries. what is a mercenary?\n a soldier who…

to protect its frontiers, the roman empire depended on mercenaries. what is a mercenary?\n a soldier who fights only for pay\n a treaty with a neighboring territory\n a military division that patrols borders\n a neighboring tribe
Answer
Answer:
a soldier who fights only for pay
Brief Explanations:
A mercenary is a professional soldier hired for money. The other options do not define a mercenary. A treaty is an agreement, a military - division is an organized unit, and a neighboring tribe is a social - cultural group, none of which are mercenaries.