While Visiting a Home Care Patient Who Uses a Multidose

While visiting a home care patient who uses a multidose vial of an expensive bronchodilator, you notice that the expiration date for this medication has passed. Which of the following actions would you recommend at this time?

A) Mix the remaining medication with a fresh batch.
B) Dispose of the medication as recommended by the manufacturer.
C) Dilute the remaining medication with saline.
D) Use the remaining medication until it is gone.