Directions: In the following sentence, one part of the sentence has an error, and the other parts are correct. Find out which part has an error and mark it as your answer. If there is no error, mark ‘No error’ as your answer. Ignore the error of punctuation, if any.

All the boys visitors are advised to stay (A)/ in the queue and follow the instructions (B)/ properly and be on their best behaviour (C)/ since the reputation of the school is at stake.(D)/ No error. (E)