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 writeonce media, decompiled to check for malicious code or loaded onto an isolated test machine.