This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Heart, Circulation, and Blood, Subject name: Physiology
Which of the following results in thirst? 
Select and explain. 
A. Cardiac failure, B. Decreased plasma levels of angiotensin II, C. Distension of the cardiac atria, D. Distension of the stomach
A: Cardiac failure
Answer: A: Cardiac failure 
Explanation: Ans. A. Cardiac failurea. Cardiac failure results in a decrease in effective arterial blood volume, which stimulates thirst.b. Because angiotensin stimulates thirst, a low plasma level would have the opposite effect.c. Distension of the atria (increased blood volume) or stomach inhibits thirst. Volume expansion and a low plasma osmolality both inhibit thirst.