A client is preparing to have a fecal occult blood test (FOBT). What health teaching would the nurse include prior to the test?

"This test will determine whether you have colorectal cancer."

"This test can determine your genetic risk for developing colorectal cancer."

"You need to avoid red meat and NSAIDs for 48 hours before the test."

"You don't need to have this test because you can have a virtual colonoscopy."