I’ll never understand _______ it came about that you were late three times a week.[ ]

A. when

B. what

C. how

D. why

下列不属于影响区域风险外部因素的是( )。

A．区域经济发展水平分析

B．区域产业结构分析

C．区域自然条件分析

D．信贷资产质量(安全性)