During a right turn, why is it essential to keep the rear of the vehicle close to the curb?

Keeping the rear of the vehicle close to the curb during a right turn is crucial primarily to avoid other vehicles passing on the right. This practice enhances safety by preventing other drivers from misjudging the space available for passing, which could lead to dangerous situations, including collisions. By positioning the rear of the vehicle near the curb, drivers create a clear boundary that discourages other vehicles from attempting to overtake on the right side, where visibility is often restricted. This maneuver also helps in maintaining better control of the vehicle during the turn, as it minimizes the potential for drifting into adjacent lanes.

The other options, while they may contribute to safe driving practices or comfort during turns, do not address the priority of avoiding conflicts with other vehicles as directly as this option does.