At the beginning of the winter, there were at least 66 students registered in a ski class. After the class started, eleven boys transferred into this class and thirteen girls transferred out. The ratio of boys to girls in the class was then 1: 1. Which of the following is not a possible ratio of boys to girls before the transfers?
A) 4:7 B) 1:2​ C) 9:13 D) 5:11 E) 3:5