Answer:
A). Most policy experiments take place on the state level first.
Explanation:
"Laboratories of democracy" is an expression popularized by U.S. Supreme Court Justice Louis Brandeis in New State Ice Co. v. Liebmann to depict how a "state may, if its citizens choose, serve as a laboratory; and try novel social and economic experiments without risk to the rest of the country." Brandeis was an Associate Justice of the Supreme Court of the United States from 1916 to 1939.