A patient experiencing significant blood loss develops hypotension. Which of the following compensatory mechanisms is primarily responsible for increasing total peripheral resistance to maintain blood pressure?

✓ Correct Answer: Option C

Hypotension due to blood loss activates the renin-angiotensin-aldosterone system (RAAS). Angiotensin II, a potent vasoconstrictor produced by the RAAS, directly increases total peripheral resistance to help maintain blood pressure.