A client who had surgery 3 days ago is sitting with the head of the bed at 75 degrees and requests to be repositioned. Which instruction is most important for the nurse to provide to the unlicensed assistive personnel (UAP)?

Lower the bed prior to helping the client to move up in bed.

Encourage the client to eat all of the meals that are sent.

Offer fruit juice at least twice during both the day and evening shifts.

Have the client hold a pillow over the abdomen to cough and deep breathe.