What type of ammunition might a mortar crew be trained on?

A mortar crew is trained on multiple types of ammunition to effectively respond to various combat scenarios and operational requirements. Mortars are flexible weapons capable of delivering different kinds of rounds, including high-explosive, smoke, illumination, and training rounds. This versatility allows the crew to adapt to different situations, such as providing suppression, marking targets, or creating obscured areas for troop movement. Therefore, the correct answer reflects the comprehensive training a mortar crew receives to handle diverse munitions for effectiveness on the battlefield.