Which of the following is true regarding a 100-hour inspection?

A 100-hour inspection is specifically designed to ensure the airworthiness of aircraft that are used for hire. According to FAA regulations, aircraft that are operated for compensation or hire must undergo a 100-hour inspection. This requirement allows for more frequent checks of the aircraft's condition and safety features than the annual inspection, which is applicable to all general aviation aircraft regardless of their use.

While private pilots can perform some maintenance tasks, they are not authorized to conduct a 100-hour inspection unless they hold an appropriate mechanic's certificate. This restriction emphasizes the need for qualified personnel to ensure the safety of aircraft used commercially. Additionally, the other options provided do not accurately reflect the conditions and regulations surrounding 100-hour inspections, reinforcing the importance of this inspection for rental or commercial operations.