Final answer:
The right gonadal vein, either the right ovarian vein for females or the right testicular vein for males, empties into the inferior vena cava (IVC). Therefore, the correct answer to the question is D) IVC.
Step-by-step explanation:
The right gonadal vein, which drains the ovary in females (right ovarian vein) and drains the testes in males (right testicular vein), empties directly into the inferior vena cava (IVC). In contrast, the left gonadal vein typically empties into the left renal vein for both sexes. To address the quiz question directly, the correct answer is D) IVC, as the right gonadal vein—including both the right ovarian vein and the right testicular vein—empties into the inferior vena cava.