Both Congress and state legislatures can make laws within areas covered under their concurrent powers,unless Congress preempts state regulation under the:

A) Supremacy Clause.
B) Takings Clause.
C) "checks and balances" system.
D) Regulatory Clause.

Concurrent Powers

Powers that are shared by both the federal and state governments in the United States.

Supremacy Clause

A clause in the U.S. Constitution declaring that federal law takes precedence over state law when the two are in conflict.

Preempts

Refers to the legal principle that federal law takes precedence over state laws in areas where the federal government has been granted authority.