Dr Semaj Had Participants Complete a Demographic Form First, Then

Multiple Choice

Dr. Semaj had participants complete a demographic form first, then a mood form, then a behavioral activity form, and then a relationship satisfaction form, followed by an interview. Dr. Semaj noticed that participants did not complete all of the later measures. This could be the result of:

A) order effects.
B) instrumentation
C) maturation.
D) history.