Task: Question Answering
Input (English): Question: 445
2a3
+ 64b
+ c53
____
1892
If a and b represent positive single digits in the correctly worked computation above, what is the value of a + b + c ?

 Option A: 2

 Option B: 7

 Option C: 9

 Option D: 11

 Option E: 12
Output (English): Option E