How did movies and radio cut across geographic
barriers?

Movies and radio cut across geographic barriers because people were able to hear and see things from all over the world.  young woman with a short skirt and rouged cheeks had her hair chopped close to a style known as a bob.

Explanation:

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.