April 2011
Intermediate to advanced
704 pages
13h 35m
English

Imagine driving along a winding road. On the one side you have sheets of blasted rock that lead up into a mountain range, on the other side you have a steep cliff, with a freefall of several hundred feet, leading into a deep ocean. The faster you drive, the sooner you will reach your destination, but the more risky the drive. For example, you may need to swerve to avoid obstacles or adjust quickly to volatile weather conditions—risk factors that are elevated when moving at higher ...
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