The correct option is C 13th, Monday
The date marked in the calendar is the 11th. So the date, day, and month will be the 11 July, Saturday.
It takes 3 days to set up the class, therefore, the set-up is expected to be done three days after the starting date, which is 14 July.
By mapping the date with the day, we can see that the 13th is a Monday.