Which cargo type would likely require the use of a C-5 or C-17 aircraft?

The correct answer is outsized cargo because this term refers to items that exceed the dimensions or weight capabilities of standard transport aircraft. Outsized cargo typically includes large equipment, vehicles, or specialized cargo that necessitates larger aircraft like the C-5 or C-17. These aircraft are specifically designed to accommodate such oversized loads, providing the necessary space, structural integrity, and loading capabilities.

Palletized cargo generally can fit within the dimensions of standard military transport aircraft and does not necessarily require the larger capacity of a C-5 or C-17. Oversized cargo, while also large, may still fit within the limits of other aircraft models that are smaller than the C-5 or C-17. Non-air-transportable cargo refers to items that cannot be transported by air due to size, weight, or other limitations, and thus would not require these specific aircraft for transport.