96. Which of the following is the most appropriate method to prepare a sample of cheek cells for PCR?

(A) Obtain cells with saline mouthwash, boil, and chelate out any contaminating metals
(B) Scrape cheek cells from inside the mouth; treat with nucleases
(C) Using sterile technique, obtain a small punch biopsy specimen and keep at room temperature
(D) Use cheek cells obtained by rinsing the mouth with an antibacterial wash, and subject the cells in culture to a strong antibiotic
(E) Use a swab to obtain cells from the outer surface of the cheek after carefully washing the area