Eddie is ordering lunch at a fast food restaurant with the following menu.  Mains: Sandwich, Burger, Pizza  Sides: Chicken Wings, Salad  Drinks: Coffee, Tea, Coke  If Eddie chooses to buy one main, one side, and one drink, how many different ways can he order lunch? 
选项为:A:$$6$$  B:$$8$$  C:$$12$$  D:$$18$$  请回答其中一个选项.