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?

Discard the incorrectly dialed dose and recalibrate the insulin pen.

Save the dialed dose and prepare the correct dose using a syringe

Assist the client to administer 24 units of the dialed dose, and waste the remainder.

Advise the client to dial down to the correct dose, which can then be administered.