When an emergency security patch is received via electronic mail, the patch should FIRST be:

A.
loaded onto an isolated test machine.

B.
decompiled to check for malicious code.

C.
validated to ensure its authenticity.

D.
copied onto write-once media to prevent tampering.

Explanation:

It is important to first validate that the patch is authentic. Only then should it be copied onto write-once media,
decompiled to check for malicious code or loaded onto an isolated test machine.