## Core Concept
Reversible cell injury, also known as cell adaptation or cellular adaptation to stress, occurs when cells are subjected to stress that doesn't immediately cause cell death. This type of injury can lead to various cellular and morphological changes. The key concept here involves understanding the cellular responses to stress, including changes in cell size, shape, and organelle function.

## Why the Correct Answer is Right
The correct answer, , is associated with cellular changes seen in reversible cell injury. One of the hallmark features of reversible cell injury is the accumulation of **swollen mitochondria** and **blebs** in the plasma membrane. However, a more specific and commonly noted change is the presence of **cytoplasmic vacuolation**, which represents swelling of the endoplasmic reticulum and mitochondrial changes. This change allows cells to survive if the injurious cause is removed.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is incorrect because it typically represents a more severe form of cell injury leading to cell death (necrosis), where the cell membrane is disrupted, and organelles are severely damaged.
- **Option B:** This option does not directly relate to common descriptions of reversible cell injury; it might represent a different type of cellular response or change not typically associated with reversible injury.
- **Option D:** This option might suggest irreversible damage or a different type of cellular response that does not align with the reversible injury profile.

## Clinical Pearl / High-Yield Fact
A key clinical pearl is that **reversible cell injury** can be seen in conditions like **ischemia** (reduced blood flow) that is brief or not severe. An example is **hydropic degeneration** or **cellular swelling**, where cells exhibit increased cytoplasmic volume due to swelling of organelles. This condition is often seen in liver cells under various stress conditions.

## Correct Answer Line
**Correct Answer: C.**