The correct answer is A) Economic Policy.
The area of policymaking that overlaps federal and state responsibilities is the Economic Policy.
Federal and states governments have their laws and sometimes have to negotiate to reach an agreement in public matters. That is the case with the economic policy, where federal and state responsibilities overlaps. The federal government has the Office of Economic Policy that is responsible for analyzing the current economic situation of the U.S. and forecast scenarios to prevent situations. This office depends on the Department of the Treasury. The states have their departments with similar responsibilities, sometimes overlapping decisions on economic issues.