Final answer:
In the wilderness, avoid eating any plants that look unfamiliar, as many contain toxins that could be harmful or fatal.
Step-by-step explanation:
When in the wilderness, you should not eat any plant that looks unfamiliar (Option C). Many plants have developed toxins as a form of defense against herbivores, and these toxins can cause mild discomfort to death in humans. Brightly colored plants, plants with a strong fragrance, and mushrooms found in the woods can all potentially be poisonous. You should only consume plants that you are absolutely certain are safe to eat. If uncertain, it is best to avoid eating any wild plants, as the risk of consuming a toxic substance is significant.