**Core Concept**
The ureters are muscular tubes that transport urine from the kidneys to the bladder, and their lining plays a crucial role in this process. The **urothelium** is a specific type of lining found in the urinary system. The lining of the ureters is composed of a specific type of epithelium that can stretch and is impermeable to urine.

**Why the Correct Answer is Right**
The correct answer is related to the type of epithelium that lines the ureters, which is **transitional epithelium**. This type of epithelium is also known as urothelium and is characterized by its ability to stretch and accommodate varying amounts of urine. The transitional epithelium is composed of multiple layers of cells, with the innermost layer being in contact with the urine.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not accurately describe the lining of the ureters.
**Option B:** Incorrect because it is not a type of epithelium found in the ureters.
**Option C:** Incorrect because it is not the correct type of epithelium that lines the ureters.
**Option D:** Incorrect because it is not related to the lining of the ureters.

**Clinical Pearl / High-Yield Fact**
The transitional epithelium plays a crucial role in preventing the backflow of urine into the kidneys. Understanding the type of epithelium that lines the ureters is essential for diagnosing and treating urinary tract disorders.

**Correct Answer:** D. Transitional epithelium