Final answer:
The most indicative medication regimen for a heart failure patient is diuretics, ACE inhibitors, and beta-blockers, which work synergistically to reduce fluid overload and strain on the heart.
Step-by-step explanation:
The medication regimen most suggestive that a patient has a diagnosis of heart failure is option c) Diuretic, ACE inhibitor, beta-blocker.
Diuretics, such as those that work on the loop of Henle, are often used in heart failure treatment to reduce fluid overload by inhibiting the reabsorption of sodium (Na+) and chloride (Cl-). ACE inhibitors are used to relax blood vessels and reduce strain on the heart, while beta-blockers help to slow the heart rate and reduce blood pressure, making the heart's job easier.