Nurses on an inpatient care unit are working to help reduce unit costs. Which of the following actions is appropriate to include in the cost- containment plan?

Use clean gloves rather than sterile gloves for colostomy care

Wait to dispose of sharps containers until they are completely full.

Return unused supplies from the bedside to the unit's supply stock.

Store opened bottles of normal saline in a refrigerator for up to 48 hr