An employee reports work was being completed on a company-owned laptop using a public
wireless hot-spot. A pop-up screen appeared, and the user closed the pop-up. Seconds later, the
desktop background was changed to the image of a padlock with a message demanding
immediate payment to recover the data. Which of the following types of malware MOST likely
caused this issue?

A.
Ransomware

B.
Rootkit

C.
Scareware

D.
Spyware