Samantha Conducts an Experiment on Her College Campus

Multiple Choice

Samantha conducts an experiment on her college campus. She learns that more women than men talk to their fathers on the phone daily. Samantha may not be able to generalize her findings to the larger population of all college women, because most of the students at her college come from extremely patriarchical surrounding towns. Samantha's problem is a lack of

A) internal validity.
B) specific variables.
C) external validity.
D) a control group.