The first regulatory agencies congress established were
a. in the labor department
b. within the environmental protection agency
c. in the department of commerce
d. government corporations
e. independent regulatory commissions

The correct answer should be c. in the department of commerce

The first ever regulatory agency was the Interstate Commerce Commission which was formed in 1887 by the congress to oversee commerce. Therefore the correct answer is C because the other ones don't have many things to do with commerce.