The Koala ate some leaves from 3 branches. Each branch had 20 leaves. The Koala ate a few leaves from the first branch and then ate as many leaves from the second branch as were left on the first branch. Then it ate 2 leaves from the third branch. How many leaves in total were left on the 3 branches? (2021 Math Kangaroo Problem, Level 3-4, Question \#14) 
选项为:A:$$20$$  B:$$22$$  C:$$28$$  D:$$32$$  E:$$38$$  请回答其中一个选项.