Question

blackberries are fruits that contain ascorbic acid, an essential nutrient for humans. every 100 grams (g) of blackberries contains 21 milligrams (mg) of ascorbic acid. many animals can make ascorbic acid in their bodies, but humans cannot. humans must get ascorbic acid from foods, including fruits and vegetables. ascorbic acid is also known as vitamin c. the student wants to explain why humans must get vitamin c from food. which choice most effectively uses relevant information from the notes to accomplish this goal? a. many animals can make ascorbic acid, which is also known as vitamin c, in their bodies. b. blackberries contain vitamin c, which humans must get from food. c. since humans cannot make vitamin c in their bodies, they must get this essential nutrient from foods like blackberries. d. there is 21 mg of vitamin c, an essential nutrient for humans, in every 100 g of blackberries.

Explanation:

The question is about why humans must get vitamin C from food. Option C directly addresses this by stating that humans cannot make vitamin C in their bodies, so they must obtain it from food. Options A and B are about animals and blackberries respectively, not focusing on the human - cannot - make aspect. Option D just gives the amount of vitamin C in blackberries without explaining the human necessity.

Answer:

C. Since humans cannot make vitamin C in their bodies, they must get this essential nutrient from foods like blackberries.