Suppose you live in New York City and the government has imposed price ceilings on apartment rental rates. You want to rent an apartment from Smith, who says that unless you buy the furniture in the apartment for $4,000, he cannot rent the apartment to you. The condition of buying the furniture could be considered

a)a price ceiling.

b)a price floor.

c)a tie-in sale.

d)to be something no renter would agree to.

e)c and d