In the following question you are asked to determine, other things equal, the effects of a given change in determinant of demand or supply for product X upon (1) the demand (D) for, or supply (S) of, X; (2) the equilibrium price (P) of X; and (3) the equilibrium quantity (Q) of X.

An increase in the number of firms producing X will

A. Increase S, decrease P, and increase Q

B. decrease S, increase P, and decrease Q

C. Increase S, increase P, and Increase Q

D. decrease S, decrease P, and increase Q

E. shift S left with no change in P and Q