Final answer:
The AR 670-1 outlines that male soldiers must have hair that is neat, clean, and presents a tapered appearance without being excessively bulky. There is no exact maximum length stated, but the hair must not fall over the ears, eyebrows, or collar.
Step-by-step explanation:
The male haircut standards according to AR 670-1 require that a soldier's hair is neat, clean, and trimmed. The hair on the top of the head must be neatly groomed. The length and bulk of the hair must not be excessive or present a ragged, unkempt, or extreme appearance. Hair must present a tapered appearance and when combed, it should not fall over the ears or eyebrows, or touch the collar, except for the closely cut hair at the back of the neck.
The correct option for the description of a male haircut according to AR 670-1 is not explicitly listed in the choices given, but the regulation allows for a bit more flexibility than the options provided. The most important aspects are that the hair must have a tapered appearance, be neat and clean, and not be excessively bulky or interfere with the proper wearing of headgear.