Law Question

Under the CERCLA, Superfund, which of the following parties would be potentially liable to the EPA for the expense of cleaning up a hazardous waste disposal, Superfund site? a. The current owner or operator; and or b. The person who transported the waste to the site; and or c. The person who owned or operated the site at the time of the disposal. For your response, choose the correct answer. It may be a, b, or c or a combination of two or all three. Provide me your answer and discuss fully.