The correct answer should be infinitive.
The most basic verb form as seen in dictionaries are the infinitive verb forms.
Answer:
1) Why Did You Start Looking For Another Job?
2) Why Are You Leaving?
3) What Does Your New Position Offer That Influenced Your Decision To Leave?
4) What Could We Have Done Better?
5) Would You Ever Consider Returning To This Company?
6) What Could We Have Done To Keep You Here?
7) Were You Comfortable Talking To Your Manager?
8) Did You Have All The Tools You Needed To Succeed At Your Job?
9) Do You Feel Your Job Description Changed Since You Were Hired? How?
10) What Was The Best Part Of Your Job?
Explanation:
There is a punctuation error, there needs to be a comma after After school
