The correct answer is D. Spam.
Spam is a term used to describe unsolicited, unwanted messages that are sent to a large number of recipients. It is often used to promote products or services, but can also be used to spread malware or phishing attacks.
Spyware is a type of malware that collects information about a user without their knowledge or consent. It can be used to track a user’s online activity, steal their personal information, or even take control of their computer.
A Trojan horse is a type of malware that disguises itself as a legitimate program. Once it is installed on a computer, it can steal personal information, damage files, or even take control of the computer.
Malware is a general term for any type of software that is designed to damage or disable computers and computer systems. It can include viruses, worms, Trojan horses, and spyware.
I hope this helps!