Because of their size, trucks/buses often need to move ________ to make right turns.

When trucks and buses make right turns, their larger size often requires them to maneuver into the left lane before completing the turn. This maneuver allows them to create enough space to navigate the turn without hitting obstacles, curbs, or even pedestrians. Unlike smaller vehicles that can turn directly without needing to move over, larger vehicles often have longer wheelbases and wider turning radii. By moving into the left lane, they can align themselves properly to make a safe turn to the right.

Other choices do not accurately depict the common practice for larger vehicles. For instance, moving to the right lane would not facilitate making a right turn and could lead to unsafe scenarios. Similarly, remaining straight in their lane or entering the turn lane do not account for the necessary adjustments these vehicles must make to accommodate their size and turning requirements.