Which statement provides the best definition of malware?

Which statement provides the best definition of malware?

A.
Malware is unwanted software that is harmful or destructive.

B.
Malware is software used by nation states to commit cybercrimes.

C.
Malware is a collection of worms, viruses, and Trojan horses that is distributed as a single package.

D.
Malware is tools and applications that remove unwanted programs.