You Are Researching an Adversary and Are Certain That You

You are researching an adversary and are certain that you saw some incriminating information on their website about six months ago, but it isn't there now. What resource below might be the quickest way to check for this data?

A) Look through the websites that target has partner relationships with
B) Use Google to look through their cache database
C) Learn to program in PERL and create a webcrawler of your own
D) "The Wayback Machine"