Under the superfund act,
a. toxic waste can enter the water system without concern.
b. most of the dangerous toxic dump sites in the u. s. have been cleaned up.
c. the epa may sue companies that dump hazardous waste illegally.
d. companies that cannot afford to clean up their hazardous wastes can have the government pay for the clean-up.

The answer that would best complete the statement is option B. Under the Superfund Act, most of the dangerous toxic dump sites in the U.S. have been cleaned up. The Superfund program is an effort of the federal government that aims in cleaning up areas that has been contaminated by hazardous waste identified by the EPA. Hope this answer helps.

Number one is sinkholes may form from water erosion