Question: Which below was a criticism of the structure of the Toxic Substances Control Act (TSCA) as originally implemented? Question Select one: a. the statute required EPA to establish that a manufactured substance posed an unreasonable risk before requiring the manufacturer to provide proof of its safety b. TSCA 'grandfathered' chemicals in use prior to passage of the law, thus encouraging manufacturers to continue to produce them instead of newer regulated chemicals c. Both of these