Task: Question Answering
Input (English): Question: Free notebooks were distributed equally among children of a class. The number of notebooks each child got was one-eighth of the number of children. Had the number of children been half, each child would have got 16 notebooks. How many notebooks were distributed in all?

 Option A: 432

 Option B: 640

 Option C: 256

 Option D: 512

 Option E: None of these
Output (English): Option D