Vera invited $$13$$ guests to her birthday party. She had $$2$$ pizzas, and each of them was cut into $$8$$ slices. Each person at the party ate one slice of pizza. How many slices of pizza were left over? (2015 Math Kangaroo Problem, Level 1-2, Question \#14) 
选项为:A:$$5$$  B:$$4$$  C:$$3$$  D:$$2$$  E:$$1$$  请回答其中一个选项.