Only people who have held past elected office can be elected as governor

What is an example of an independent variable that is impossible or unethical to manipulate?

A) Exposure to a natural disaster. B) Participation in group or individual therapy C) Living near a previously unknown chemical dump D) Both A and C

Both the number of PACs (political action committees) and the amount of money PACs spend on elections have declined at an alarming rate in recent years.

Answer the following statement true (T) or false (F)