An email message containing a warning related to a non-existent computer security threat, asking a user to delete system files falsely identified as malware, and/or prompting them to share the message with others would be an example of:.
a) virus hoax
b) impersonation
c) phishing
d) bluejacking

Virus Hoax

Explanation:

A computer virus hoax is a message that warns someone of a false virus threat. It is a a chain email that encourages who ever has received the message to pass it to other people as a form of warning.

the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.