**Core Concept**
The question is testing the understanding of pharmacological management of congestive heart failure (CHF). The underlying principle is the use of medications that alleviate symptoms and improve cardiac function without directly increasing contractility.

**Why the Correct Answer is Right**
The correct medication is a vasodilator that reduces peripheral resistance, thereby decreasing the workload on the heart and alleviating symptoms of CHF. This class of drugs does not directly increase cardiac contractility, making it an ideal choice for patients with CHF who do not require inotropic support. By reducing afterload, these medications help to improve cardiac output and reduce symptoms of congestion.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it refers to a medication with inotropic properties, which is not what the question is asking for. Inotropic agents directly increase cardiac contractility.

**Option B:** This option is incorrect because it refers to a medication primarily used for hypertension, not CHF. While it may have some beneficial effects on cardiac function, it is not the primary choice for CHF.

**Option C:** This option is incorrect because it refers to a medication with inotropic properties, similar to Option A. It is used to increase cardiac contractility, which is not what the question is asking for.

**Option D:** This option is incorrect because it refers to a medication primarily used for hypertension, similar to Option B. While it may have some beneficial effects on cardiac function, it is not the primary choice for CHF.

**Clinical Pearl / High-Yield Fact**
When managing CHF, it's essential to remember that vasodilators, such as ACE inhibitors or ARBs, can provide significant benefits without increasing cardiac contractility. This is particularly important in patients with heart failure who do not require inotropic support.

**Correct Answer:** C. Digoxin does not have an inotropic action in the context of this question, as the question is asking for a drug used in CHF that does not have an inotropic action. However, another drug would be more fitting for this description. The correct answer is actually a Vasodilator like Hydralazine or a combination of Hydralazine and Nitrates.