Under the Clean Air Act

Under the Clean Air Act,

A) states and the EPA were to act as partners wherein the individual states would formulate state implementation plans to meet primary and secondary standards created by the EPA.
B) the EPA formulated primary and secondary standards for air pollution;however,the individual states were not required to comply with these standards if they already had reasonable state statutes or regulations in place.
C) the states were required to follow the guidelines established by the EPA and did not have the authority to create their own state plans for implementing the federal standards.
D) state laws or regulations preempt or take precedence over the guidelines promulgated by the EPA.