Sarah Had Been Working with a Personal Trainer in Beginning

Sarah had been working with a personal trainer in beginning a new fitness program. The first time she went to the gym to work out alone, she tried to remember all the safety tips her trainer gave her. She immediately started with the bench press exercise. She chose light weights and breathed in and out throughout the exercise. As Sarah finished her third set of bench presses, she realized she'd remembered everything correctly except to

A) warm up before getting started.
B) hold her breath while lowering the weights.
C) start with the heaviest weights first.
D) breathe only through her mouth.