Mudflows generally contain ________.
A. primarily mud-sized particles with some water, but certainly no particles greater than sand size
B. primarily water with some mud-sized particles, but no larger grains
C. only mud-sized particles
D. primarily mud-sized particles with some water, but may also contain particles as large as boulders
E. primarily mud-sized particles with some water, but no larger grains
Answer: D
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