Diffusion is best defined as:

A. the random motion of individual molecules
with net movement from areas of higher
concentration to areas of lower concentration.
B. the random motion of individual molecules
with net movement from areas of lower
concentration to areas of higher
concentration.
C. the highly ordered movement of large
groups of molecules from areas of higher
concentration to areas of lower concentration.
D. the highly ordered movement of large
groups of molecules from areas of lower
concentration to areas of higher
concentration.
E. the transition from individual molecules
moving in a random manner to groups of
molecules moving in a highly ordered
manner.


A

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