**Core Concept**
Alcoholic hyaline, also known as Mallory-Denk bodies, is a characteristic histopathological feature seen in alcoholic liver disease. These inclusions are composed of altered keratin intermediate filaments and other cytoskeletal proteins, which accumulate in the cytoplasm of hepatocytes due to oxidative stress and cellular injury.

**Why the Correct Answer is Right**
The correct answer is **Mallory-Denk bodies**. These inclusions are composed of altered keratin intermediate filaments, specifically keratins 8 and 18, which are normally expressed in the cytoskeleton of hepatocytes. However, in response to chronic alcohol exposure, the normal balance of keratin expression is disrupted, leading to the accumulation of these altered filaments and the formation of Mallory-Denk bodies. This process is thought to be mediated by the action of various enzymes, including protein kinase C (PKC) and the ubiquitin-proteasome pathway.

**Why Each Wrong Option is Incorrect**
* **Option A:** **Fatty change** is a common feature of alcoholic liver disease, but it is not composed of Mallory-Denk bodies. Fatty change refers to the accumulation of triglycerides in hepatocytes, which can be seen in response to chronic alcohol exposure.
* **Option B:** **Glycogen** is a polysaccharide stored in the liver, but it is not a component of Mallory-Denk bodies. Glycogen accumulation can be seen in other conditions, such as glycogen storage diseases.
* **Option C:** **Iron** is a metal ion that can accumulate in the liver in conditions such as hemochromatosis, but it is not a component of Mallory-Denk bodies.

**Clinical Pearl / High-Yield Fact**
Mallory-Denk bodies are a characteristic feature of alcoholic liver disease, and their presence can be used as a diagnostic clue in patients with a history of chronic alcohol abuse. However, it is worth noting that Mallory-Denk bodies can also be seen in other conditions, such as non-alcoholic steatohepatitis (NASH) and viral hepatitis.

**Correct Answer: C. Mallory-Denk bodies.