How does venous constriction contribute to maintaining arterial circulation during low blood pressure?

• A. Reducing venous capacity shifts more blood toward the heart and arteries
• B. Constricting arteries increases systemic vascular resistance without altering venous volume
• C. Enhancing venous return to the heart without specifying reduced venous capacity
• D. Transporting excess cholesterol from arteries via high‑density lipoprotein particles

Answer: (A)