What Is the Difference Between an Idiotype and an Idiotope

What is the difference between an idiotype and an idiotope?

A) Idiotopes are on the antibody and idiotypes are on the antigen.
B) Idiotopes can only react with T cells and idiotypes can only react with B cells.
C) Idiotopes are an amino acid sequence, and idiotypes are groups of idiotopes.
D) Idiotopes and idiotypes have the same sequence but in different locations on the antibody.