Question

20 POINTS !!!!!!!!!!! QUICK

Great Lakes salmon populations can carry high concentrations of toxic chemicals. When the salmon move into streams and tributaries to lay their eggs, the toxic chemicals are passed on to other fish that feed on salmon eggs. Dams have protected some habitats. The salmon are unable to swim past the dams, therefore blocking those habitats from the introduction of the contaminated eggs.

Officials in Michigan are beginning to look at removing the dams in many rivers. The removal of dams can help to create a natural and healthy river system. This will allow organisms and nutrients to move upstream and help to balance the ecosystems. Removing the dams, however, could allow the introduction of contaminated fish into previously isolated habitats.

Which of the following would be the best solution to prevent the introduction of toxic chemicals into isolated habitats once the dams are removed?
A.
remove the fish in the Great Lakes that eat salmon eggs so the toxic chemicals do not get passed on to other animals
B.
prevent the salmon from entering rivers to lay their eggs and create a habitat in the Great Lakes for reproduction of the salmon
C.
reduce the levels of toxic chemicals found in the Great Lakes to lower the concentration found in salmon
D.
introduce a new species of fish into the Great Lakes that is more able to become immune to the toxic salmon eggs

Answer 1

reduce the levels of toxic chemicals found in the Great Lakes to lower the concentration found in salmon

Step-by-step explanation:

this is the only answer that makes sense