Assuming That Chinese Food and Thai Food Are Substitutes, If

Assuming that Chinese food and Thai food are substitutes, if P. F. Chang's Chinese Restaurant reduces its prices:

A) ​the sales of the nearby Bahn Thai restaurant will increase.
B) ​demand for meals at P.F.Chang's will increase.
C) ​the demand for meals at the Bahn Thai restaurant will decrease.
D) ​the quantity of food demanded from P.F.Chang's will decrease.