2000年$$AMC8$$竞赛第$$24$$题  If $$a$$ and $$b$$ are integers, what is the least integer $$x$$ for which the inequality $$a ~\textless{} ~b ~\textless{} ~a+x$$ could be true．
选项为:A:$$-1$$  B:$$0$$  C:$$1$$  D:$$2$$  请回答其中一个选项.