Instructor Kendra Observes a Class Participant Moving Incorrectly or in an Unsafe

Instructor Kendra observes a class participant moving incorrectly or in an unsafe manner. The best way for her to provide positive feedback would be to say:

A) "Don't hold your breath while lifting weights."
B) "Holding your breath while weightlifting is not a good idea."
C) "Don't bear down when you lift something heavy because it can be dangerous."
D) "Make sure you remember to exhale while you lift the weights to prevent doing the Valsalva maneuver."