With which of the following is the device MOST likely infected?

Ann. An employee in the payroll department, has contacted the help desk citing multiple issues with her device, including:

– Slow performance

– Word documents, PDFs, and images no longer opening

– A pop-up

Ann states the issues began after she opened an invoice that a vendor emailed to her. Upon opening the invoice, she had to click several security warnings to view it in her word processor.

With which of the following is the device MOST likely infected?
A . Spyware
B . Crypto-malware
C . Rootkit
D . Backdoor