The oil washed from land will also lead to the death of fish. People are worried. (adjective + that)
A.People are worried about that the oil washed from land will also lead to the death of fish.
B.People are worried that the oil washed from land will also lead to the death of fish.
C.People is worried that the oil washed from land will also lead to the death of fish.
D.People are worried that the oil is washed from land will also lead to the death of fish.