Given:<br /> <img src="https://nimg.ppkao.com/2018-08/wenxueying/2018080109510276420.png?sign=3c0802c9764f5236b282f270bb8395bb&t=62d5c184" /><br /> Which statement is true?()
A、The output could be 5-1 6-1 6-2 5-2
B、The output could be 6-1 6-2 5-1 5-2
C、The output could be 6-1 5-2 6-2 5-1
D、The output could be 6-1 6-2 5-1 7-1