Final answer:
Private Munroe, accused of insubordination, B. will face a court martial, which is a military judicial proceeding for trying service members' offenses.
Step-by-step explanation:
If Private Munroe is accused of insubordination, he will most likely face a court martial. Option B is correct as a court martial is a judicial hearing specific to the military where service members can be tried for military offenses. Plea bargains, convictions, and appeals courts are steps or outcomes that may occur after the initial judicial proceedings. In the military, insubordination is a serious offense and is typically addressed through the court martial system.