C. Glacier travel is hazardous and should be avoided.
穿越冰河十分危险，应当尽量避免。
One of the biggest hazards of glacier travel is breaking through a snow bridge and falling into a crevasse.
冰川行走其中一个最大的危险是雪桥断裂，接着掉进冰裂缝。
Since 1996, China has gradually developed into the largest glacier travel and one of the current national geological park formally comment.
1996年以来已经逐步开发成为我国规模最大的冰川旅游地之一，目前正式获评国家地质公园。
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