Case 4-1 You Check Your Email and Find Several Messages from Friends

Case 4-1
You check your email and find several messages from friends and acquaintances plus two messages with attachments: one from a friend and one from a sender that you do not know.
-Which of the following actions should you consider taking with the two messages with attachments in order to avoid the risk of infecting your computer with a virus?

A) Delete the message from the unknown sender; but open and read the friend's message and attachment, although you were not expecting the message or attachment
B) Delete both messages and attachments without opening and reading them
C) Open and read both messages and attachments
D) Forward both messages and attachments to another friend and ask him or her to check them out for you