Since vitamins are contained in a wide variety of foods, people seldom lack of most of them48/50Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. Since vitamins are contained in a wide variety of foods, people seldom lack of most of them.are in a variety of lack ofGiải thíchĐáp án D Lack of => lack