(Scenario III) Suppose the Researchers in Scenario III Initially Designed

Multiple Choice

(Scenario III) Suppose the researchers in Scenario III initially designed the study so that the mice were on their respective diets for only one week. After finding no effect of diet on weight, they decided to increase the length of exercise to one month. The design change from 7 days to 30 days most likely affected the study's:

A) power.
B) external validity.
C) hypothesis.
D) reliability