What environmental factor contributed to the C-130J elevator jam during takeoff?

The correct answer highlights the impact of ground loading procedures on the C-130J elevator jam during takeoff. Ground loading involves the methods and processes used to load cargo and personnel onto the aircraft while it is on the ground. If these procedures are not executed properly or if there is an overload of weight or an improper weight distribution, it can lead to significant changes in aircraft control surfaces, including the elevators, which are crucial for managing the aircraft’s pitch.

In this specific incident, improper loading might have led to a situation where the elevators were unable to respond effectively to the pilot's inputs during flight, particularly during the critical phase of takeoff. This emphasizes the importance of careful weight management and adherence to established loading protocols to ensure safe operations.

The other options, while they may pose risks to aircraft operation, are not relevant in this context. High winds typically affect stability but would not directly cause an elevator jam. Cloud cover generally impacts visibility but does not interfere with the mechanical operations of flight controls. Electrical failure could impact various systems but would not specifically lead to an elevator jam as a direct result of ground loading practices.