Which of the Following Contains Only Normative Statements

Which of the following contains only normative statements?

A) The birth rate is reduced as economies urbanize, but that also leads to a decreased average age of developing countries' populations.
B) An increase in the price of corn will decrease the amount of corn purchased. However, it will increase the amount of wheat purchased.
C) A decrease in the price of butter will increase the amount of butter purchased, but that would be bad because it would increase Americans' cholesterol levels.
D) none of the above contain only normative statements.