In Pre-Post Design,researchers Measure the Outcome of Interest Once Before

Multiple Choice

In pre-post design,researchers measure the outcome of interest once before the intervention,introduce the intervention,and then measure the outcome again.Why is this considered the simplest method of reflexive control?

A) Measurements rarely vary across pre-post design.
B) Participants serve as their own controls.
C) They effectively measure outcomes in long-term evaluation studies.
D) Few variables are likely to change on their own regardless of intervention.