CAYLEY 2015 Problem 9

John goes for a jog every 3 days. He went for a jog on Monday, January 5. He went for his next jog on January 8. What was the date of the next Monday on which he went for a jog?

Answer Choices
A. January 12
B. January 19
C. January 26
D. February 2
E. February 9