—How about going to the park by bus?

—I prefer ______ rather than ______.        [ ]

A. to ride a bike; take a bus    

B. to take a bus; ride a bike

C. riding a bike; take a bus    

D. taking a bus; ride a bike

男婴，3个月。冬季出生，足月顺产，单纯牛奶喂养，未添加辅食。近半个月来较烦躁，夜哭闹不安，多汗。体检：体重6kg，有颅骨软化。最可能的诊断是（）

A.营养不良

B.亚临床维生素A缺乏症

C.维生素D缺乏性佝偻病

D.婴儿肠痉挛

E.维生素PP缺乏