A nurse is teaching about methods to promote sleep to a client who has insomnia. Which of the following statements should the nurse make?

"Perform 20 minutes of cardiovascular exercise 1 hour before bedtime."

"Avoid eating heavy meals 3 hours before bedtime."

"If you are unable to sleep, wait 1 hour before trying a quiet activity."

"Avoid caffeinated beverages 2 hours prior to bedtime."