Which of the Following Is Correct with Regard to the Elements

Which of the following is correct with regard to the elements in the marketing mix?

A) Of the four elements,"product" is generally the least important.
B) The elements are all equally important,regardless of the product being sold.
C) Price plays a small role in fresh meat,but a relatively larger role in selling newspapers.
D) Distribution is not very important in marketing gasoline,but it is important for lumber.
E) Promotion is vital in selling toys,but much less important in selling nails.