Peter Rabbit eats cabbages and carrots. Each day he eats either $$10$$ carrots or $$2$$ cabbages. Last week Peter ate $$6$$ cabbages. How many carrots did he eat last week? (2014 Math Kangaroo Problem, Level 1-2, Question \#18) 
选项为:A:$$20$$  B:$$30$$  C:$$34$$  D:$$40$$  E:$$50$$  请回答其中一个选项.