The phrase, 'check off' means '
to mark as verified, examined, etc.' Eg: After I finished shopping, I took my shopping list and checked off all the items. The phrase, 'check out' means 'settle one's hotel bill before leaving'. Eg: I checked out of the hotel at 11 a.m. today and reached the airport at 11.30 a.m.
The phrase, 'check up' means 'to make certain about something by checking it'. Eg: Please check up the train timings once again before you leave home.
Given the meanings as above, the phrases given in options A, B and C cannot be used in the blank to form a meaningful sentence. Hence, these options are incorrect.