I thought it was on TV but it was just on the Intarwebs, I stand corrected there:
Ask Cris: Strategic move - NFL - Yahoo! Sports
Basically he said that Monk was not the most feared receiver on his team and didn't make a lot of Pro Bowls.
Which, surprise, surprise, are both things that were true of Carter and his Vikings. Except they flamed out in the playoffs perennially. I think it's fairly disingenuous for Carter to answer this question just a few weeks before the HoF nominations come out, knowing he'd be a first ballot candidate. That question shouldn't have been picked for his little "mailbag" at all.