单选题The use of sinking and dispersing chemical agents for removal of surface oil is（）.Athe most common methodBtoo expensive for common useCgenerally safe to sea lifeDauthorized only with prior approval of the governmental On-Scene Coordinator
单选题
The use of sinking and dispersing chemical agents for removal of surface oil is（）.
A
the most common method
B
too expensive for common use
C
generally safe to sea life
D
authorized only with prior approval of the governmental On-Scene Coordinator
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