A pilot in command (PIC) may not allow any object to be dropped from an aircraft if it:

The pilot in command (PIC) must prioritize safety during all operations, including the potential act of dropping objects from an aircraft. The correct answer highlights that any object dropped must not create a hazard to persons and property. This is in accordance with regulations that ensure the protection of individuals on the ground or in other aircraft, as well as property underneath the flight path.

Dropping objects that could harm people or damage property poses significant legal and ethical responsibilities for the PIC. The regulations are clear in emphasizing the need to avoid any actions that could lead to accidents or injuries. Thus, a conscientious pilot must assess the potential impact of any dropped object and refrain from proceeding if there is a risk involved.

Considering the other options, they pertain to conditions that, while they may relate to operational aspects, do not directly address the fundamental safety requirement of avoiding hazards. Objects affecting aircraft performance are critical considerations, but the primary concern remains ensuring safety for people and property below. Visibility from the cockpit and the weight of the object may be relevant for operational decisions, but they do not override the necessity to ensure that no hazard is created by the act of dropping anything from the aircraft.