Blii and Elsa went to see a movie together and sat in the same row. Ela was in the sixth row counting from the front of the room and Elsa was seated in the fourteenth counting from the end. How many rows in their room? (Adapted from 2001 Math Kangaroo Problem, Level 3-4, Question \#13) 
选项为:A:$$8$$  B:$$9$$  C:$$19$$  D:$$20$$  E:$$21$$  请回答其中一个选项.