What are the possible XO choices at an XOI?

The correct answer identifies possible XO choices at an XOI (Explained Operating Instructions). In this context, the options relate to typical disciplinary actions within a military structure. The mention of "Dismissal with EMI" (Extra Military Instruction) signifies a more nuanced form of discipline that allows for retention while also imposing a remedial program, which fits within the framework of an XO's available responses. Captain's Mast also refers to a non-judicial punishment system that can be utilized for naval personnel, aligning perfectly with the authority an XO possesses.

The other options, while they may contain forms of discipline, do not entirely capture the specific mechanisms available to an XO. For instance, dismissal alone lacks the remedial focus that EMI provides, and Captain's Mast is more tailored to captains rather than being items within the XO's purview. Therefore, the combination of "Dismissal with EMI" and "Captain's Mast" accurately reflects appropriate courses of action at an XOI, making it the most fitting choice.