Below Are Some Data on Price,income and Demand for Five

Multiple Choice

Below are some data on price,income and demand for five different time periods.

-Refer to the information above to answer this question.Between years 4 and 5,both the price and the quantity demanded of X increased.What is the best possible explanation of this?

A) Graphically,the demand curve for X must be upward sloping.
B) Product Y is a complement of product X.
C) Product X is a substitute for product Y.
D) Graphically,the demand curve for product X must have shifted leftwards.
E) None of the choices are correct.