Identify the sentence that uses passive voice. a. this past christmas, my nephew was hoping to receive some gift cards for his game system. b. oscar wilde once stated to a customs official that he had nothing to declare but his genius. c. the students are being instructed to use the side entrance to the dorm until further notice. d. over 5,000 people, many of them having driven overnight, attended the concert in new york.

The correct answer is C. The students are being instructed to use the side entrance to the dorm until further notice.

Explanation:

In the passive voice, it is common the object of the action is presented first, then the main verb and finally the subject, although this is often omitted. In this way, the subject is less important or is passive. In the case of sentence "The students are being instructed to use the side entrance to the dorm until further notice" this is in passive voice because in this case the object "the students" which are the ones affected by the action are presented first, additionally, the verb construction "are being instructed" show the students are not performing the action, but this is performed by a subject that has been omitted, which is a characteristic in the passive voice.