A firm produces chairs. An economist working for the firm predicts that 'if people's incomes rise next year, then the demand for our chairs will increase, ceteris paribus.' The accuracy of the economist's prediction depends on whether the chairs that firm produces:

(A) Have many complementary goods.
(B) Have few substitutes.
(C) Have few complementary goods.
(D) Are normal goods.

A firm produces chairs. An economist working for the firm predicts that ‘if people’s incomes rise next year, then the demand for our chairs will increase, ceteris paribus.’ The accuracy of the economist’s prediction depends on whether the chairs that firm produces: