One day, long ago, a little baby was _____________. [ ]

A. bear

B. was born

C. born

ofo、摩拜、小蓝、由你、永安行5家共享单车公司表示，用户押金将统一存放在银行，进行（）。押金和充值余额均可退。

A.自主监管

B.第三方资金监管

C.行业监管

D.社会共同监管