"In the Corn Market, Demand Often Exceeds Supply and Supply

"In the corn market, demand often exceeds supply and supply sometimes exceeds demand." "The price of corn rises and falls in response to changes in supply and demand." In which of these two
Statements are the terms demand and supply being used correctly?

A) In neither statement.
B) In the second statement, "The price of corn rises and falls in response to changes in supply and demand."
C) In the first statement, "In the corn market, demand often exceeds supply and supply sometimes exceeds demand."
D) In both statements.