Some advanced materials are an old standard with a new twist. The newest fiberoptic cables that carry telephone calls cross-country are made of glass so transparent that a piece of 100 miles thick is clearer than a standard window pane.

A. Because it can help a wound to dry.
B. Because it can cover a rough surface.
C. Because it can make a wound smooth.
D. Because it can prevent disease entering a wound.

A. in order to identify themselves with others
B. in order to better identify others
C. as their mental processes change
D. as the situation changes