Task: Question Answering
Input (English): Problem: the ratio between b and y is 7 / 9; b and y are increased by 4, what is the ratio between the new values of b and y ?
Options: a. 7 / 9, b. 14 / 9, c. 7 / 18, d. 11 / 13, e. it can not be determined
Output (English): e