A nurse is reinforcing teaching a client who is scheduled for a barium swallow to evaluate dysphagia. Which of the following statements should indicate to the nurse that the client understands the instructions?

"I will expect my stool to be black after this procedure."

"I will drink plenty of fluids after the test."

"I will maintain a clear liquid diet 24 hours before the test."

"I will expect a warm feeling when the dye is injected."