Answer:
Confounding variable
Explanation:
Confounding variable refers to the type of variable that can disrupt the validity of the experiment by giving a certain effect to the variable.
The experiment above was designed to measure mood elevation among the subjects, but the living situation among the subjects are really different among one another and cannot be controlled by the researchers.
a. greater market for goods and services
This is actually a good question because people confuse fear and phobia often.
A fear is being afraid of something, like climbing a mountain because you're afraid you might fall. But a phobia is an anxiety disorder and has to be diagnosed. Phobias don't pose a threat. Phobia would be a fear of the number 13 and getting anxiety when you see a 13 (it's a real phobia, too).
The Senate because each state has only two senators no matter the size of the state.
