Task: Question Answering
Input (English): Question: An elementary school houses primarily kindergartners, first graders, second graders, and third graders. If an assembly included 30 kindergartners, 20 first graders, and 80 other children, and the ratio of first graders to third graders is tripled, what is the ratio of the first graders to the rest of the children?

 Option A: 40: 20

 Option B: 42: 21

 Option C: 50: 100

 Option D: 15: 25

 Option E: It cannot be determined by the information given.
Output (English): Option E