Approved child restraint systems (CRSs) are not allowed in which of the following areas?

The correct answer highlights that approved child restraint systems (CRSs) are not allowed in exit row seats, front row seats, or the seats directly behind the front row. This restriction is primarily due to safety concerns.

In an exit row, passengers may need to assist in evacuating the aircraft in the unlikely event of an emergency. The presence of a CRS can hinder a child's or caregiver's ability to quickly exit the row, thereby limiting their ability to respond effectively in an emergency situation.

Similarly, in the case of front row seats, the design of the aircraft's interior typically prohibits the use of CRSs to ensure there is no obstruction that could impede safety procedures. The area immediately behind the front row may also be subject to similar restrictions since the same safety considerations apply.

Other options propose various areas in the aircraft that may generally accommodate passengers or their belongings, but they do not pertain to the specific safety guidelines regarding CRSs.