What technique should the nurse use to obtain a throat culture from a client who

What technique should the nurse use to obtain a throat culture from a client who is suspected to have a bacterial pharyngitis and tonsillitis?
A.   Ask the client to expectorate mucus/sputum into a sterile specimen container upon first arising after a full night's sleep.
B.   Ask the client to gargle with a mouthful of sterile normal saline for 30 seconds, and then to expectorate the saline into a sterile container.
C.   Rub a sterile swab first over the right tonsillar area, moving across the right arch, the uvula, and the left arch to the left tonsillar area.
D.   Dampen a sterile swab with sterile normal saline and then gently rub the hard and soft palates, taking care to avoid areas with a white or cream-colored patch.