A nurse is teaching the guardian of a child who is suspected of having cystic fibrosis and is scheduled for a sweat chloride test. Which of the following statements should the nurse include?

"Your child will need to receive sedation to minimize pain during the test."

"It will take approximately 3 hours to complete the test."

Two separate samples will be collected to ensure accuracy of the test results."

"Your child should avoid eating and drinking 6 hours prior to the test."