A client has 6/10 knee pain at the beginning of a workout. At the end of the first set of the lateral step with a mini-band his knee pain decreased to 4/10. At the end of the second set it decreased to 2/10. After the third set, his knee pain increased back to 4/10. What should you do next? A. Stretch his hamstrings
B. Move on to another corrective exercise that targets the glutes
C. Make a note to never repeat that corrective exercise in the future
D. Perform a fourth set and see if it helps