Answer:
C) Single-user, multi-tasking operating systems
Answer: A. CRYPTO-MALWARE
Explanation: Crypto-malware is a type of ransomware that blocks the uses from accessing the computer system,it also encripts all the files.
This type of ransomware is mainly used to demand for ransom.
This type of ransomware which makes use of sophisticated and advanced ransomware technology to ensure that encripting must be with a unique Key or password,the hijacked system is used for crypto mining without the owns consent.
Answer: Suboptimization is referred to as a term that has been approved for common policy mistake. It usually refers to the practice of concentrating on a single component of a whole and thus making changes which are intended towards improving that component and also ignoring its effects on other components.