Which of the following is an example of ransomware?
A. A user is asked to pay a fee for a password to unlock access to their files.
B. A user receives an email demanding payment for a trial application that has stopped working.
C. A user has opened an Internet browser and is taken to a site that is not the normal home page.
D. A user is asked to open an attachment that verifies the price of an item that was not ordered.
