When learning to use an insulin pen, a client with diabetes dials 28 units of regular insulin instead of 24 units, the prescribed dose. Which action should the nurse take?

D Advise the client to dial down to the correct dose, which can then be administered. B Save the dialed dose and prepare the correct dose using a syringe C Assist the client to administer 24 units of the dialed dose, and waste the remainder. A Discard the incorrectly dialed dose and recalibrate the insulin pen.