**Core Concept**
Caspases (cysteine-aspartic acid proteases) are a family of proteolytic enzymes playing a central role in the execution phase of cell death, particularly during apoptosis (programmed cell death). These enzymes cleave specific protein substrates, leading to the characteristic morphological changes and cellular disintegration associated with apoptosis.

**Why the Correct Answer is Right**
The correct answer is related to the activation of caspases, which occurs through two main pathways: the intrinsic (mitochondrial) pathway and the extrinsic (death receptor) pathway. In both pathways, the activation of initiator caspases (e.g., caspase-8 and caspase-9) leads to the activation of executioner caspases (e.g., caspase-3 and caspase-7), which then cleave key cellular substrates, such as PARP (poly(ADP-ribose) polymerase), leading to DNA fragmentation and cell death.

**Why Each Wrong Option is Incorrect**
* **Option A:** Caspases are not primarily involved in cell proliferation. While caspases can cleave and inactivate proteins involved in cell cycle regulation, they are not directly responsible for promoting cell growth or proliferation.
* **Option B:** Caspases are not the primary enzymes involved in autophagy. While there is some overlap between autophagy and apoptosis, caspases are not the key regulators of autophagy.
* **Option C:** Caspases are not the main enzymes involved in inflammation. While caspases can cleave and activate pro-inflammatory cytokines, they are not the primary regulators of the inflammatory response.

**Clinical Pearl / High-Yield Fact**
Caspases are often referred to as "executioner" enzymes because of their central role in executing cell death during apoptosis. Understanding the caspase pathway is crucial for developing therapeutic strategies to modulate apoptosis in various disease states, including cancer and neurodegenerative disorders.

**Correct Answer: D. Caspases are involved in apoptosis.**