Suppose the Demand Curves for Goods A,B,and C Have the Following

Multiple Choice

Suppose the demand curves for goods A,B,and C have the following functional forms,where Q denotes quantity demanded,P denotes price,and M denotes income: Q_A = 120 - 3.5P_A - 6P_B + 14M
Q_B = 100 - 2P_B + 3P_C + 1.1M
Q_C = 1500 - 0.5P_C - 300M.
Based on these demand curves,which of the following goods are known to be inferior goods?

A) A
B) B
C) C
D) A and B only
E) A,B and C