Consider two markets with goods that are perfect substitutes. The consumer has a demand function for the first good given by D(P)=8−4P, where P is the price of the first good. If the price of the other good decreases, the new demand function for the first good is most likely:多项选择题

A

a. D(P)=8−2P

B

b. D(P)=10−4P

C

c. D(P)=4−4P

D

d. D(P)=8−4P

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