Answer: C) he or she should come to the drama room this afternoon.
Explanation: the given sentence starts with the subject "student" which is singular, so when we complete the sentence with a second clause, the subject (in this case the pronoun) used, should also be singular. From the given options, the only one that uses a singular pronoun is option C, so the complete sentence would be: "If a student would like to be part of the class play, he or she should come to the drama room this afternoon."
