The Basic Difference Between Rent and Other Payments for Productive

The basic difference between rent and other payments for productive inputs is that

A) a reduction in rent will not influence the availability of the input; reductions in other input payments will reduce their availability.
B) rent is earned income to the input owner; other input payments are unearned.
C) rent is payment for use of an input; other input payments are made to obtain input services.
D) rent is payment for an input that has alternative uses; other input payments are for unique inputs.
E) There are no basic differences among these payments.