Think Academy will hold a concert. The stage and seats have been set up. There are $$40$$ benches that can only seat one people each, and there are $$7$$ benches that can seat three people each ,How many people can all the chairs and benches hold? 
选项为:A:$$40$$  B:$$54$$  C:$$61$$  D:$$70$$  请回答其中一个选项.