**Core Concept**
The question is testing the knowledge of the histological origin of prostate cancer. Prostate cancer arises from the epithelial cells of the prostate gland, which is a glandular organ. The prostate gland is composed of glandular and stromal tissue, with the glandular tissue being the site of origin for prostate cancer.

**Why the Correct Answer is Right**
Prostate cancer is a type of adenocarcinoma, which originates from the glandular epithelium of the prostate gland. The glandular epithelium is composed of secretory cells, which produce prostatic fluid, and basal cells, which are thought to play a role in the development of prostate cancer. Prostate cancer typically arises from the peripheral zone of the prostate gland, which is the largest part of the gland. The development of prostate cancer is thought to involve a series of genetic and epigenetic alterations that lead to uncontrolled cell growth and tumor formation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because prostate cancer does not arise from the stromal tissue of the prostate gland, which is composed of fibroblasts and smooth muscle cells. While stromal tumors can occur in the prostate gland, they are a different entity from prostate cancer.
**Option B:** This option is incorrect because prostate cancer does not arise from the neuroendocrine cells of the prostate gland. While neuroendocrine cells can be found in the prostate gland, they are not the site of origin for prostate cancer.
**Option C:** This option is incorrect because prostate cancer does not arise from the urothelial cells of the prostate gland. Urothelial cells line the urinary system, including the bladder and ureters, but are not the site of origin for prostate cancer.

**Clinical Pearl / High-Yield Fact**
It's worth noting that prostate cancer can be divided into several subtypes, including adenocarcinoma, neuroendocrine carcinoma, and small cell carcinoma. Adenocarcinoma is the most common subtype of prostate cancer and is typically associated with a more favorable prognosis.

**Correct Answer: D. Adenocarcinoma**