A ship is being attacked by pirates. One by one the pirates climb a rope to get on the ship. The pirate captain is the $$8$$\textsuperscript{th} in line, and there are as many pirates in front of him as there are behind him. How many pirates are in line to climb the rope?（）($$2015$$ Math Kangaroo Problem, Levels $$1-2$$, Question \#$$18$$) 
选项为:A:$$7$$  B:$$8$$  C:$$15$$  D:$$16$$  请回答其中一个选项.