How Do Researchers Examine an IQ Test for Possible "Bias

Multiple Choice

How do researchers examine an IQ test for possible "bias"?

A) See whether the test includes any items that most people fail to answer correctly.
B) See whether scores of one or more groups has been increasing over time.
C) See whether the test scores inaccurately predict the performance of some group.
D) See whether members of one group get higher scores than another, on average.