Task: Question Answering
Input (English): Question: What is the tens' digit R of the sum of the first 40 terms of 1, 11, 111, 1111, 11111, 111111, ...?

 Option A: R=2

 Option B: R=3

 Option C: R=4

 Option D: 8

 Option E: 9
Output (English): Option B