Here Is a Consumption Function: C = C₀ + MPC(Y_d)

Here is a consumption function: C = C₀ + MPC(Y_d) .If MPC is 0.75,then we know that

A) as Y_d rises by $1,Co rises by $0.75.
B) as Y_d rises by $1,C rises by $0.75.
C) Y_d rises by $0.75.
D) as C₀ rises by $0.75,Y_d rises by $1.