Swell is more regular than waves in the wind-generated area because ________.
A. packets of swell are all at the same depth at the same time
B. waves have been sorted by dispersion
C. waves have been sorted by dispersion and some small waves have been damped out by friction
D. some small waves have been damped out by friction
E. waves have been sorted by dispersion, some small waves have been damped out by friction, and packets of swell are all at the same depth at the same time
Answer: C
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