What is the maximum transportation method for a JLTV by semi-trailer?

The maximum transportation method for a JLTV by semi-trailer being "as long as it's operational" underscores the versatility and readiness of the vehicle. This option correctly implies that the JLTV can be transported on a semi-trailer while still being fully operational and ready for immediate use upon arrival at a destination. Transporting the JLTV in this state ensures that it can engage in mission-critical tasks without delays, allowing for rapid deployment wherever needed.

The focus on operational readiness makes this choice the most sensible, as it aligns with the tactical requirements of the USMC to maintain high levels of readiness and flexibility. Utilizing a semi-trailer in this way allows for efficient movement of the JLTV without compromising its functionality, which is essential in fast-paced military scenarios.