**Core Concept**
The nutrient artery is a vital blood vessel that supplies oxygen and nutrients to the bone tissue. It is a branch of the artery that enters the bone through a specific opening, providing essential nutrients for bone growth and maintenance.

**Why the Correct Answer is Right**
The nutrient artery enters the bone through a small opening called the nutrient foramen, which is usually located at the end of the bone. This opening is a passage through the dense cortical bone, allowing the nutrient artery to penetrate and supply the inner bone tissue. The nutrient foramen is typically found at the end of the bone, where the bone marrow cavity is largest, ensuring that the nutrient artery can reach the bone's core and provide optimal nutrient supply.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the nutrient artery does not enter the bone through the epiphyseal plate, which is the growth plate responsible for bone elongation.
* **Option B:** This option is incorrect because the nutrient artery does not enter the bone through the periosteum, which is the outermost layer of the bone covering the cortical bone.
* **Option C:** This option is incorrect because the nutrient artery does not enter the bone through the bone marrow cavity, which is the spongy tissue within the bone where blood cells are produced.

**Clinical Pearl / High-Yield Fact**
Remember that the nutrient artery enters the bone through the nutrient foramen, usually located at the end of the bone. This is a crucial anatomical landmark for orthopedic surgeons and radiologists to identify during procedures or when interpreting imaging studies.

**Correct Answer: D. The end of the bone.**