**Core Concept**
Beta blockers are used to reduce heart rate and contractility in congestive cardiac failure (CCF) by antagonizing beta-1 receptors in the heart. This leads to decreased sympathetic tone and subsequent reduction in myocardial oxygen demand.

**Why the Correct Answer is Right**
Beta blockers, specifically beta-1 antagonists, are beneficial in CCF as they decrease the heart rate and contractility. This reduces the workload on the heart, decreases the demand for oxygen, and ultimately leads to improved cardiac output. **Metoprolol**, a beta-1 selective antagonist, is commonly used in this scenario.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify a beta-1 antagonist. **Option B:** This option is incorrect as it is not the correct beta-1 antagonist used in CCF. **Option D:** This option is incorrect as it is not the correct beta-1 antagonist used in CCF.

**Clinical Pearl / High-Yield Fact**
Beta blockers should be used cautiously in patients with asthma or COPD, as they can precipitate bronchospasm. It's essential to monitor patients for signs of bradycardia and hypotension when initiating beta blocker therapy.

**Correct Answer:** C. Metoprolol.