**Core Concept**
The underlying principle being tested is the management of acetaminophen overdose, which involves understanding the pharmacological treatment to counteract the toxic effects of **acetaminophen** on the liver.

**Why the Correct Answer is Right**
The effective antidote for acetaminophen overdose is **N-acetylcysteine (NAC)**, which works by replenishing **glutathione** stores in the liver, thus helping to detoxify the toxic metabolite of acetaminophen, **N-acetyl-p-benzoquinone imine (NAPQI)**. NAC is most effective when administered within 8-10 hours of acetaminophen ingestion.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specified.
**Option B:** Incorrect because it is not specified.
**Option C:** Incorrect because it is not specified.
**Option D:** Incorrect because it is not specified, but typically, options like activated charcoal, while useful in some overdoses, are not the antidote for acetaminophen.

**Clinical Pearl / High-Yield Fact**
In cases of acetaminophen overdose, timely administration of NAC is crucial to prevent liver damage. The treatment should be guided by the **Rumack-Matthew nomogram**, which helps in assessing the risk of liver toxicity based on the serum acetaminophen concentration and the time elapsed since ingestion.

**Correct Answer:** D. N-acetylcysteine.