Although they are an inexpensive supplier of vitamins, minerals, and high quality protein, eggs

Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction  in each of the following questions

(A) Although they are (B) an inexpensive supplier of vitamins, minerals, and high quality protein, eggs (C) contain a high level of blood cholesterol, one of the major (D) cause of heart disease