Which is the best revision of the underlined portion of the sentence? may keep things safe for students, which makes it necessary. maintains the necessary safety of the student environment. is necessary to maintain a safe environment for students. no change

If the sentence is: A school's right to search student lockers to keep things safe for the community might be a necessary thing. Then the best revision would be C. is necessary to maintain a safe environment for students. Therefore, the whole revised sentence would be like this: A school's right to search student lockers is necessary to maintain a safe environment for students. The A option is wordy, and B sounds too bureaucratic and technical.