He said they were married,although I'm sure they aren't.他说他们已经结婚了, 可是我肯定他们没有。【句子意思】
A 他说他们已结婚,【然而】我不信。颠倒了主次。Although he said they were married, (yet) I am...就对了。
B啊 however 后面一般有个逗号的吧 他说他们结婚了,但是我确信他们没结婚
选B,尽管我确定他们并没结婚,可他还是说他们结了。
A