Final answer:
Soldiers are permitted to dye, tint, or bleach their hair, but only with natural colors that conform to typical human hair colors in order to maintain a uniform and professional appearance.
Step-by-step explanation:
The question pertains to whether soldiers are allowed to change their hair color. The answer is C) Yes, but only natural colors are allowed. Military regulations typically stipulate that any hair dye, tint, or bleaching must result in a color that is deemed natural to human beings, which usually includes brunette, blonde, brown, black, and natural red. Unnatural colors like blue, green, or pink, which are not typically found as natural human hair colors, are not permitted. These rules are in place to ensure uniformity and maintain professional appearance among service members.