Which of the following is not allowed to be carried in a house or boat trailer?

Carrying persons in a house or boat trailer is not permitted due to safety concerns and legal regulations. Trailers are designed for transporting goods, not for transporting individuals. This is primarily because trailers lack the necessary safety features, such as seat belts or proper seating arrangements, to safely support passengers.

Allowing persons to be transported in a trailer presents significant risk; in the event of an accident, the occupants would be at serious risk of injury or worse because they would not be adequately restrained. Regulations regarding trailers prioritize the safety of both the trailer occupants and those on the road, reinforcing the idea that trailers should only be used for their intended purpose—transporting goods or recreational equipment.