A bar graph shows the number of hamburgers sold by a fast food chain each season. However, the bar indicating the number sold during the winter is covered by a smudge. If exactly 25 \% of the chain’s hamburgers are sold in the fall, how many million hamburgers are sold in the winter?
Answer Choices
A. 2.5
B. 3
C. 3.5
D. 4
E. 4.5