Question

which of the following statements about b vitamins is true?
a americans are at high risk of b vitamin deficiencies, and therefore should take a b vitamin supplement.
b b vitamins are fat soluble.
c many metabolic pathways require multiple b vitamins.
d b vitamin deficiencies are easy to diagnose because the signs and symptoms are very specific.

Explanation:

• Option A: A balanced diet usually provides enough B - vitamins for Americans, so they are not at high - risk of deficiencies and don't necessarily need supplements.
• Option B: B - vitamins are water - soluble, not fat - soluble.
• Option C: Many metabolic processes like energy production rely on multiple B - vitamins (e.g., B1, B2, B3, B5, B6, B9, B12) as co - factors.
• Option D: Symptoms of B - vitamin deficiencies can be non - specific and overlap with other conditions, making diagnosis not always straightforward.

Answer:

C. Many metabolic pathways require multiple B vitamins.