All military branches offer a variety of combat and non-combat careers. There are actually three categories of positions in the military. Where an applicant joins depends on her interests, skills, and experience. What are the three categories? A. enlisted, commissioned officer, or non-commissioned officer B. non-commissioned officer, warrant officer, commissioned officer C. enlisted, officer, or reserve D. infantryman, warrant officer, or ordinance officer

C. Enlisted is actually the most common way to sign up. Officer is another way when the person already has been to college and went into OCS, or they went to a military academy. Reserve is basically were they sort of join, however, the person gets to stay at home and hold down a regular job. Then of course, there would be some events with their unit.

Explanation why the others are wrong: A. Is wrong because non-commisioned officer is basically an enlisted with several years' experience under their belt. B. Warrant officer is where things can get a bit 'screwy' they're higher than NCO's but subordinate to the lowest officer. D. infantryman is just an MOS, ordinance is also an MOS, warrant officer is not really fitting in either category, however, they are the more officer-like version (If they're in the said MOS's) of the job.

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i think the answer is b.