Final answer:
The diaphragm is activated when your client can bear down correctly. It is a thin sheet of skeletal muscle that separates the thoracic and abdominal cavities and is the primary muscle of breathing.
Step-by-step explanation:
The correct answer is A) Diaphragm. When your client can bear down correctly, it means they are activating their diaphragm. The diaphragm is a thin sheet of skeletal muscle that separates the thoracic and abdominal cavities and is the primary muscle of breathing. It contracts and moves downwards, allowing the lungs to expand and fill with air.