Of the Standards Below, There Is One That Is NOT

Of the standards below, there is one that is NOT used to evaluate the usefulness of a personality theory:

A) if the theory generates data and results that apply generally to all people.
B) if the theory allows the prediction of future events with some precision.
C) how well the theory provides a comprehensive framework in which known material can be incorporated.
D) how well the theory stimulates the discovery of new knowledge.