Test anxiety occurs a. before a test c. after a test b. during a test d. any of these

D.

Before a test could be because you're unsure of how you will do.

During a test because you're unsure of how well you're doing or if you're getting the correct answers.

After a test could be because you're unsure of how well you did and what score you'll get on it.

Igot the answer, here you go dude. 

Answer(a) one needs to learn from experts and be determined to be the best in the field;