A Client Who Was Started on Trifluoperazine (Stelazine)two Days Ago

A client who was started on trifluoperazine (Stelazine) two days ago presents with muscle spasms of the tongue.The physician orders diphenhydramine (Benadryl) 50 mg IV.The reason for administering Benadryl to this client is:

A) To decrease saliva and mucous secretions.
B) To sedate the patient.
C) To reverse the acute dystonia.
D) To prevent anaphylaxis.