What maneuver requires you to back for a distance of 50 feet at a slow speed while looking to the rear during the driving exam?

Answer: A — Backing

The maneuver that requires you to back for a distance of 50 feet at a slow speed while looking to the rear during the driving exam is simply called "backing." This is different from a three point turn, which involves turning the car around by making three distinct movements. A U-Turn involves turning the car around in a narrow space, such as a two-lane road. Parallel parking requires you to back into a spot between two cars, but it does not specifically require you to back for a distance of 50 feet. So while all of these options involve some form of backing, the correct answer is A because it specifically mentions the distance and slow speed requirement, making it the most accurate option.