Task: Question Answering
Input (English): Question: If each of 4 digit code is formed of integers from 1 to 10, inclusively, and each of the digits are different, how many possible codes are there?

 Option A: 6,040

 Option B: 6,840

 Option C: 6,240

 Option D: 5,040

 Option E: 4,069
Output (English): Option D