Depends on whether C1, C2 and C3 are among the claims in the patent.

If only the combination of the 3 Cs is novel, then probably.

The problem with current patent law (which I've discussed at length with my neighbor who writes patents for a living) is that the US Patent office has taken the stand that you can file (and they'll grant) a patent on anything and its up to the courts to invalidate frivolous patents.

Natch, what this does is hand all the cookies to the companies with the most money for lawyers to defend their do-nothing patents. Economic might makes right kind of thing. It sucks, patents are licenses for the wealthy to steal IP from the little guy.