问题详情

Which of the following statements about the research is CORRECT？

A．The research has found that caffeine levels in the Pacific Ocean have risen.

B．The research proved that cafes and coffeehouses caused the pollution.

C．The research is carried out by researchers from Poland, U.S. and Canada.

D．The research starts a series of studies on Ocean water.

请帮忙给出正确答案和分析，谢谢！