It’s official. McDonald’s is back. Consumers and investors are ba da ba ba ba lovin’ it.McDonald’s reported fourth-quarter revenues and earnings that easily topped analysts’ forecasts, led by a 5.7% jump in same-store sales in the United States. CEO Steve Easterbrook, who took over at McDonald’s nearly a year ago, said the company’s introduction of its all day breakfast menu in October was the main reason that U.S. sales did ...