支持企业可持续发展的核心因素是（）。

A.超额的利润

B.有生命力的企业文化

C.合理的利润

D.企业的管理制度

.Why ！I have nothing to confess。________you want me to say？

A．What is it that

B．What it is that

C．How is it that

D．How it is that