Credit: dallasnews.com

When McCluskey, et. al. (2019) expressed concern that the shooting of the police officers in Dallas may negatively impact their experience, they were identifying a potential problem with which of the following?

a. Selection bias

b. Maturation

c. External Events / History Effects

d. Contamination

e. Treatment Misidentification 

One of these answers is correct and the other four are incorrect.

Using various readings and PowerPoint presentations, explain why each one of the statements is either correct or incorrect.