单选题 Promethazine hydrochloride (Phenergan) 35 mg IM is ordered for a client who is experiencing nausea and vomiting after surgery. The ampule's label reads 25 mg/mL. How many mL should the nurse prepare to administer?
A. 0.7 mL.
B. 1.0 mL.
C. 1.4 mL.
D. 1.8 mL.