What was the primary purpose of Roman baths?

What was the primary purpose of Roman baths?
A、They served as a place for military training and strategy.
B、They were used exclusively for religious rituals.
C、They provided facilities for bathing and social interactions.
D、They functioned as centers for trade and commerce.
【正确答案】：C
【题目解析】：They provided facilities for bathing and social interactions.