Which supply class is primarily concerned with support equipment?

The correct choice is Class VII, as this supply class specifically pertains to Major End Items, which includes support equipment. Support equipment encompasses the various tools, vehicles, machinery, or other physical devices essential for supporting operations, missions, and activities. Major End Items are generally categorized as those items that can be used independently and play a crucial role in operational readiness.

Class III primarily represents petroleum, oils, and lubricants (POL), while Class V refers to ammunition and explosives, neither of which directly relates to support equipment. Class II includes non-military specific supplies like clothing and individual equipment, which also does not focus on equipment used to support operations. Therefore, Class VII stands out as the category that encompasses critical support equipment needed for military and operational functions.