Which of the Following Is a Disadvantage of Prototyping

Which of the following is a disadvantage of prototyping?

A) Prototyping encourages a return to the "code, implement and repair" life cycle.
B) Prototypes are a passive model of the system.
C) End-users don't fully understand their requirements until they see them implemented.
D) Errors cannot be detected as easily when a prototype is developed.
E) none of these