Task: Question Answering
Input (English): Question: The youngest of 4 children has siblings who are 2, 7, and 11 years older than she is. If the average (arithmetic mean) age of the 4 siblings is 25, what is the age of the youngest sibling?

 Option A: 17

 Option B: 18

 Option C: 19

 Option D: 20

 Option E: 21
Output (English): Option D