The use of sinking and dispersing agents for the removal of surface oil is （）.<br>A:the most common method used in the United States<br>B:too expensive for common use<br>C:generally safe to sea life<br>D:generally harmful to sea life

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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