**Core Concept**
The question tests the understanding of opioid pharmacology, specifically the management of opioid-induced respiratory depression. Opioids exert their effects through **mu (μ) receptors** in the central nervous system.

**Why the Correct Answer is Right**
Although the correct answer is not specified, the most appropriate choice would be an opioid receptor antagonist that has a preferential effect on reversing respiratory depression without completely abolishing analgesia. **Naloxone** is a well-known opioid antagonist, but it reverses both analgesic and respiratory depressant effects. A more specific answer might involve drugs that are partial agonists or those that selectively reverse respiratory depression.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific option provided, it's challenging to address each choice directly. Generally, options that are pure opioid agonists or those that enhance opioid effects would be incorrect.
**Option B:** Similarly, without specifics, any option that does not address the selective reversal of respiratory depression would be incorrect.
**Option C:** An option that completely blocks opioid effects, including analgesia, would not be correct.
**Option D:** Any choice that does not have a mechanism to selectively alleviate respiratory depression would be wrong.

**Clinical Pearl / High-Yield Fact**
It's crucial to remember that **naloxone** can reverse opioid overdose symptoms, including respiratory depression, but it may also reverse analgesia. Newer agents are being researched for their ability to selectively counteract respiratory depression without affecting pain relief.

**Correct Answer:** Correct Answer: D. Naloxone.