A conductor wanted to make a trio consisting of a fiddler, a pianist, and a drummer. He had to choose one of two fiddlers, one of two pianists, and one of two drummers. He decided to try each of the possible trios. How many attempts did he have to make? 
选项为:A:$$3$$  B:$$4$$  C:$$8$$  D:$$24$$  E:$$25$$  请回答其中一个选项.