**Core Concept**
Striae of Retzius are a histological feature observed in the bladder, specifically within the lamina propria of the trigone area. They are characterized by linear or wavy deposits of collagen and elastic fibers. The presence of these striae is often associated with bladder outlet obstruction.

**Why the Correct Answer is Right**
The correct answer involves the understanding of the histological changes that occur in response to bladder outlet obstruction. Striae of Retzius are a result of the chronic stretching and tension on the lamina propria due to increased intravesical pressure. This leads to the deposition of collagen and elastic fibers, forming the characteristic striae. The striae act as a scar tissue, attempting to reinforce the weakened area.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not accurately describe the histological feature of striae of Retzius.
**Option B:** This option is incorrect as it is a characteristic of a different histological feature, not striae of Retzius.
**Option D:** This option is incorrect as it describes a condition that is not directly related to striae of Retzius.

**Clinical Pearl / High-Yield Fact**
Striae of Retzius are a common finding in cases of bladder outlet obstruction, such as benign prostatic hyperplasia (BPH). They can also be seen in other conditions that cause increased intravesical pressure, such as bladder tumors or neurogenic bladder.

**Correct Answer:** C.