Task: Question Answering
Input (English): Question: In a two-digit number, if it is known that its unit's digit exceeds its ten's digit by 4 and that the product of the given number and the sum of its digits is equal to 90, then the number is:

 Option A: 15

 Option B: 27

 Option C: 38

 Option D: 46

 Option E: 48
Output (English): Option A