Britian's Wm Morrisons Supermarkets has accepted a buyout offer from the U.S. private equity firm Clayton, Dubilier & Rice as the bidding for the venerable grocer heats up. Clayton, Dubilier & Rice offered 7 billion pounds, roughly $9.5 billion, for the U.K. supermarket, translating to 285 pence, or $3.90, per share.