Fill in the blank with a suitable preposition.
The students were asked to stay ______ the campus due to the commotion outside.
The prepositions ‘away’ and ‘within’ mean opposite things. ‘Away’ means to stay far off from a place, while ‘within’ means to stay inside the limits of a building or area. In the given sentence the students need to stay inside so that they don’t get hurt due the commotion outside. Hence option C is correct, whereas option A is incorrect. On the other hand ‘with’ is used to denote a tool or to speak about someone being in the company of someone else. The campus is not a tool or something that provides company, therefore option B is incorrect. ‘For’ is a preposition of reason, which is unsuitable here because ‘the campus’ is not the reason for the students staying there. Hence option D is incorrect.