112, 40, 100, 64 − Which of the following is the demand function produced by these combinations (not the demand curve, the demand function) .

A) ( D(p) = 112p − 40 )
B) ( D(p) = {112/p} − 40 )
C) ( D(p) = 112p² − 40p )
D) ( D(p) = 112 − 40p )