If you ______to her about it yesterday, you ________ what to do now. [ ]

A. should have spoken; would know    

B. spoke; would know

C. had spoken; would have known    

D. had spoken; would know

应英国女王伊丽莎白二世邀请，（）总统希金斯2014年4月8日起对英国进行为期4天的正式访问。希金斯是首位对英国进行国事访问的爱尔兰国家元首。希金斯的访问被英国媒体称为“历史性的一刻”。