Which of the following units is not associated with WWII naval combat demolition?

The Marine Corps Infantry is not specifically associated with WWII naval combat demolition in the same way that the other units in the choices are. During World War II, Naval Combat Demolition Units (NCDUs) and Navy Underwater Demolition Teams (UDTs) were specialized forces created to carry out demolition tasks, such as removing obstacles from beaches and harbors to facilitate amphibious landings. These units focused on tasks directly tied to naval operations and were crucial in preparing the way for larger amphibious assaults.

The Navy Raiders were elite units formed for special operations, including conducting raids against enemy positions, but they were not strictly limited to demolition roles. In contrast, while Marine Corps Infantry played a vital role in ground combat and often worked closely with naval forces during amphibious assaults, they were not specialized demolition units. Their primary mission involved direct engagement with enemy forces rather than the specialized tasks assigned to the NCDUs and UDTs.