The correct answer is C. Power supply.
A power supply is a device that converts electrical energy from one form to another, typically from alternating current (AC) to direct current (DC). It is an essential component of any electronic device that requires power, such as computers, monitors, printers, and scanners.
Power supplies can be damaged by static electricity, which is a build-up of electrical charge on an object. When two objects with different electrical charges come into contact, the charge can flow from one object to the other, causing a spark. This spark can damage the sensitive components inside a power supply.
To prevent damage from static electricity, power supplies are typically shipped in anti-static bags. Anti-static bags are made of a material that conducts electricity, which helps to dissipate any static charge that may build up on the power supply.
The other options are incorrect because they are not as susceptible to damage from static electricity. Monitors, floppy disks, I/O controllers, and other electronic devices can be damaged by static electricity, but they are not as likely to be damaged as power supplies.
In addition, power supplies are typically the most expensive component in an electronic device. Therefore, it is important to take steps to protect them from damage, such as shipping them in anti-static bags.