A.The price of a commodity and the quantity demanded
B.The income of consumer and the quantity demanded
C.The relationship betweent he price of one commodity and the price of a substitute
D.The price of two commodities
E.All of the above
A.The price of a commodity and the quantity demanded
B.The income of consumer and the quantity demanded
C.The relationship betweent he price of one commodity and the price of a substitute
D.The price of two commodities
E.All of the above