Keith is meeting his friends at the lake for a camping trip. He bought a case of beer but only plans to drink half of it on Friday night and the other half on Saturday night. By the end of Friday night, to Keith's surprise he only drank seven beers, all of which occurred after dinner while sitting by the campfire. From this scenario, Keith's drinking behavior is best described as ____.
◦ binge drinking
◦ social drinking
◦ alcoholism
◦ irresponsible drinking