Final answer:
Females are authorized to wear earrings with the Class C uniform in the U.S. Army.
Step-by-step explanation:
In the U.S. Army, females are indeed authorized to wear earrings with the Class C uniform. The Class C uniform is the standard duty uniform for the U.S. Army and consists of a long or short-sleeved shirt, trousers or skirt, and a garrison or utility cap. Army Regulation 670-1 states that female soldiers may wear earrings as long as they are conservative and not excessive or gaudy.