Alimentation Couche-Tard announced today that despite rising revenue, its quarterly profit dropped 23% due to lower U.S. gasoline margins, Reuters reported. Couche-Tard, North America’s second-biggest convenience store chain, operates more than 5,400 convenience stores, with some 3,600 of those also selling gasoline. The company earned $54.8 million, or 29 cents a share, in its third-quarter,…