A.Unless I was taught how to handle the stress of test taking, I would have had a good performance in the exam.
B.If only I had been taught how to handle the stress of test taking to have a good performance in the exam.
C.I wish I hadn’t been taught how to handle the stress of test taking to have a good performance in the exam.
D.I will have a good performance in the exam as long as I had been taught how to handle the stress of test taking.