If today is Sunday, then which day is it exactly on 10^10 th day?
A
Wednesday
B
Thursday
C
Friday
D
Saturday
Correct Answer: Option A
Explanation
1. **Identify the Goal**: We need to find the day of the week for the '10^10th day' given Today is Sunday. This is a classic 'Periodicity of Calendar Days' problem [1], [62].
2. **Translate to Math**: The day of the week depen