According to Campbell, What Is One Problem with Adding Up

According to Campbell, what is one problem with adding up multiple criteria to create a single composite criterion?

A) Such a criterion contains a great deal of data and is often too complex to be used for hiring decisions.
B) Such a criterion treats performance as if it were a single construct.
C) Such a criterion makes it too difficult to select the single best person for a job.
D) Such a criterion is not typically used in organizations because it tends to be quite expensive.