Final answer:
The PCT should autoclave the instruments to sterilize them.
Step-by-step explanation:
To sterilize the instruments, the PCT should autoclave them.
An autoclave is a device that uses steam and high pressure to sterilize instruments and kill microorganisms. It is the most effective sterilization method and is commonly used in medical settings.
Washing the instruments with soap and water (option A), soaking them in bleach solution (option B), or wiping them with alcohol (option D) may clean the instruments, but they will not sterilize them.