Conan O'Brien hosts the Conan show and Andy Richter, his sidekick, writes for it. Conan needs 4 hours to rehearse and host a good show. It takes Andy 10 hours to do the same. Conan writes one usable joke in an hour, but Andy needs 2 hours to do the same. If each party produces according to his comparative advantage: A) Andy will host and Conan will write. B) Andy will host and Andy will write. C) Conan will host and Conan will write. D) Conan will host and Andy will write.