The main risk of ballast water according to the passage is that

The main risk of ballast water according to the passage is that _______.

A.it may kill all other species in the oceans other than the organisms themselves

B.the disposal of ballast water may kill all other species in the oceans

C.The quantity of ballast water to be disposed of is huge

D.it may endanger other species in the oceans.

正确答案是D