The comments which he made ______ marketing bothered his boss greatly.

A．being concerned

B．concerned

C．be concerned

D．concerning

下列史实能体现唐朝较为开放的社会风气的是

①武则天登基成为皇帝②唐三彩的生产

③妇女以穿男装、戎装为时尚④允许不同民族、不同国家的人参加科举考试和做官[ ]

A．①②

B．①③④

C．①②③

D．①②③④