Suppose Consumers Spent $42 Million on Christmas Trees Last Year,when

Suppose consumers spent $42 million on Christmas trees last year,when the average tree cost was $30.This year they spend $42 million,when the average tree costs $25.Assume that everything else remains constant.This data suggests that _____

A) consumers bought the same number of Christmas trees this year as last year.
B) the price of the Christmas trees stayed the same.
C) total revenue to tree producers rose this year.
D) the demand for trees is unit elastic.
E) the demand for trees is inelastic.