Which of the Following Is an Example of a Normative,as

Which of the following is an example of a normative,as opposed to positive,statement?

A) If the price of a product decreases,people's willingness to buy that product will increase.
B) Reducing tax rates on the wealthy would benefit the nation.
C) If the national saving rate were to increase,so would the rate of economic growth.
D) The elimination of trade restrictions would increase an economy's standard of living.