Can an adult carry a passenger on a bicycle which, by design, cannot be occupied by more than one person?

Can an adult carry a passenger on a bicycle which, by design, cannot be occupied by more than one person?
A)Only if the rider pedals while standing and the passenger sits on the saddle.
B)Yes, a child up to seven years of age in a homologated additional seat.Correct
C)No, it is prohibited.
An adult may carry a passenger on a bicycle which, by design, cannot be occupied by more than one person, provided that the passenger is a child up to seven years of age and is using a homologated additional seat. This measure is established to ensure the safety of the child during transport on the bicycle. Homologated additional seats are specifically designed to provide safe and comfortable support for children during the bicycle ride.