Grandpa Gao is in the habit of taking a walk after dinner. One day, he walked along the road at an even speed. It took him $12$ minutes to walk from the first tree to the $13$th tree. Grandpa Gao walked a few more trees and then went back. When he reached back to the fifth tree, it took him $50$ minutes. So which tree grandpa Gao reached when he decided to walk back? 
选项为:A:$$20$$  B:$$24$$  C:$$27$$  D:$$28$$  E:There is no right answer.  请回答其中一个选项.