Which company is responsible for manufacturing the HMMWV?

The correct answer is AM General because this company is the original manufacturer of the High Mobility Multipurpose Wheeled Vehicle (HMMWV), commonly known as the Humvee. AM General designed and developed the HMMWV in the early 1980s specifically to meet military requirements for a versatile and robust vehicle that could operate in various terrains and under challenging conditions. This model eventually became a vital part of the U.S. military's fleet, contributing to its capabilities in transportation, combat, and logistical support.

The other companies listed, while they are well-known in the automotive industry, did not play a role in the design or manufacture of the HMMWV. General Motors, for example, may have produced military vehicles at different points in history but is not connected to the HMMWV's production. Ford and Chrysler have also developed their own military vehicles but did not have any involvement with the HMMWV program. Therefore, AM General stands out as the only correct answer in this context.