Superfoods are characterized as food items that are supposed to confer remarkable health benefits and provides a very concentrated source of nutrition including protein, fats, and other nutritional necessities. <u>The key detail regarding the 'most of the superfoods having rich and vibrant color' from the fourth paragraph justifies a characteristic that most superfoods have despite their nutritional value</u>. Thus, <u>option D</u> is the correct answer.
