What caused the pilot to jam the elevator in the C-130J?

The correct answer highlights a specific situation involving the C-130J and the necessity to manage the aircraft's operational capabilities effectively. Jamming the elevator in this context typically refers to a condition where the elevator control is overridden to prevent it from moving. In scenarios involving heavy cargo loads, particularly when the center of gravity shifts due to shifting loads, a pilot may need to adjust the control surfaces mechanically.

This action is often more about controlling the aircraft's behavior in flight rather than traditional control or enhancing performance under normal circumstances. Therefore, making room for cargo relates directly to the necessity to maintain proper balance and response of the aircraft given the specific load configuration. In this scenario, the critical need to accommodate and safely transport cargo overshadows other factors such as stabilization, performance enhancement, or adjusting for passenger distribution. Understanding these operational choices emphasizes the importance of weight and balance considerations in aviation operations.