Answer:
C). Regulatory agency.
Step-by-step explanation:
As per the question, a 'regulatory agency' is responsible for the enforcement of governmental regulations in a particular area or field of the economy.
Regulatory agency was established under the 'legislative act' and described as the autonomous governmental structure/body that not only functions to specify a set of standards or laws for a particular activity field but also responsible to ensure the effective reinforcement of these standards or laws under its supervision. It functions on an executive level that directly monitors the lucid enforcement of these laws. Thus, option C is the correct answer.