Final answer:
Having a third leg or a third arm is not possible in human biology, and neither option would be beneficial or feasible.
Step-by-step explanation:
Having a third leg or a third arm is not possible in human biology. Humans are designed to have two legs and two arms, and an additional limb would not be functional or beneficial for our body structure.
Even if it were possible to have a third limb, it would pose many challenges in terms of balance, coordination, and movement. Our bodies are built to function optimally with two legs and two arms, and any extra limb would complicate these functions.
Therefore, the answer to the question would be neither (C), as neither option is feasible or advantageous for human biology.