单选题The use of sinking and dispersing agents for the removal of surface oil is （）.Athe most common method used in the United StatesBtoo expensive for common useCgenerally safe to sea lifeDgenerally harmful to sea life
单选题
The use of sinking and dispersing agents for the removal of surface oil is （）.
A
the most common method used in the United States
B
too expensive for common use
C
generally safe to sea life
D
generally harmful to sea life
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