**Core Concept:** The ductus deferens is a male reproductive duct that carries semen from the epididymis to the vas deferens during ejaculation. It plays a crucial role in the male reproductive system.

**Why the Correct Answer is Right:** The correct answer, **Option C: The inferior vesical artery**, is responsible for supplying blood to the ductus deferens. The inferior vesical artery is a branch of the internal pudendal artery, which in turn arises from the inferior vesical artery (also known as the internal pudendal artery). This artery supplies blood to the ductus deferens, ensuring its proper functioning during ejaculation.

**Why Each Wrong Option is Incorrect:**

A. **Option A: The dorsal artery**: This is not the correct answer because the dorsal artery is responsible for supplying blood to the penile corpora cavernosa, not the ductus deferens.

B. **Option B: The crus commune**: The crus commune is a part of the pelvic plexus, which is responsible for supplying blood to the pelvic organs and muscles, not specifically to the ductus deferens.

D. **Option D: The internal pudendal artery**: Although the internal pudendal artery is mentioned in the correct answer, the inferior vesical artery (internal pudendal artery) is the specific branch responsible for supplying blood to the ductus deferens.

**Clinical Pearl:** The inferior vesical artery (internal pudendal artery) is a crucial component of the male reproductive system, as it ensures proper blood supply to the ductus deferens, which is essential for ejaculation during sexual activity. A thorough understanding of arterial anatomy is essential for diagnosing and treating male infertility, erectile dysfunction, and other male reproductive system disorders.