A nurse is reinforcing teaching with a client about collecting a stool specimen to check for occult blood. Which of the following statements by the client indicates an understanding of the teaching?

"Eating pasteurized dairy products will affect my test results."

"Having urine mixed in with the stool will not affect the results."

"I should avoid eating red meat for 3 days before my test."

"I should collect a specimen once each week for 4 weeks."