Which of the Following Queries Will Use the Given Columns

Which of the following queries will use the given columns and column aliases from the PRODUCT table to determine the total value of inventory held on hand?

A) SELECT P_DESCRIPT,P_QOH,P_PRICE,P_QOH/P_PRICE FROM PRODUCT;
B) SELECT P_DESCRIPT,P_QOH,P_PRICE,P_QOH=P_PRICE FROM PRODUCT;
C) SELECT P_DESCRIPT,P_QOH,P_PRICE,P_QOH*P_PRICE FROM PRODUCT;
D) SELECT P_DESCRIPT,P_QOH,P_PRICE,P_QOH-P_PRICE FROM PRODUCT;