光对病案的危害表现在许多方面，下列说法正确的是（）。

A.光会使病案纸张发生粘连

B.光使字迹变形，难以辨认

C.光的热效应影响非磁记录病案的耐久性

D.光破坏缩微胶片中片基的耐久性

E.光的照射能降低光盘材料的耐摩擦能力

When an organism is completely encapsulated and preserved, it becomes a fossil, therefore turning into evidence of things that once lived.

A．thereby

B．as a result of

C．so

D．in the end