Plz

which word is the best meaning of the underlined word in this paragraph? the night watchman made his rounds to check that all the doors in the office building were locked and secure. everything was quiet and he was sure that there was nothing left to examine. so he settled in at the front desk in the lobby with a book. but then he heard a loud crash by the elevators. a. read b. catch c. test d. watch

the underlined word is examine