An increase in blood flow to the atria of the heart can cause the release of $A$, which causes $B$ and thereby decreases the blood pressure. The $ANF$ mechanism therefore acts as a check on $C$. Here, $A-C$ refers to:

• A
  $A-ANF, B-\text{vasoconstriction}, C-\text{renin-angiotensin mechanism}$
• B
  $A-ANF, B-\text{vasodilation}, C-\text{renin-angiotensin mechanism}$
• C
  $A-\text{vasopressin}, B-\text{vasodilation}, C-\text{renin-angiotensin mechanism}$
• D
  $A-\text{vasopressin}, B-\text{vasoconstriction}, C-\text{renin-angiotensin mechanism}$