What is the minimum altitude over a built-up area?

The minimum altitude over a built-up area is indeed set at 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet from the aircraft. This standard is put in place to ensure a margin of safety in case of an emergency, minimizing the risk of damaging property or causing injury to people below. The requirement also helps to ensure that pilots maintain a safe distance from buildings, structures, or any potential obstacles within urban environments.

The options that do not specify this requirement either suggest lower altitudes or different metrics that do not align with the regulations governing minimum altitude over built-up areas, leading to a higher risk during flight operations.