Joe, a user, saves a document to a flash drive on his computer in order to print the document from a public computer kiosk. After returning home and reinserting
the flash drive in his computer, the security software identifies an infected file on the flash drive. Which of the following is the MOST likely cause of the infection?

A.
The flash drive was infected by a war driving hacker on the way to the public kiosk.

B.
The public workstation was infected by Joe’s flash drive.

C.
The public workstation was infected and passed the virus to the flash drive.

D.
The flash drive was already infected by the user’s computer.