A 14 year old boy has a fiberglass cast placed on their left arm after a snowboarding accident The LPN is reinforcing the patient education on cast care. Which statement by the client demonstrates proper cast care knowledge?

"I can shower with the cast on since it is fiberglass"

"If I break the cast I need to call the doctor"

"I can use a ruler to scratch inside the cast if it starts to itch"

"I should lay in bed for the next 6 weeks to allow the bone time to heal"