Respuesta :
Generally speaking, when the European Union formed, nations began to "cooperate on law enforcement," since it was far easier for criminals to cross European borders after the creation of the EU.
The correct answer is: Cooperate on law enforcement
The European Union (EU) is a political community formed to achieve integration and a government in common of states of Europe.
It was based on the union of the three European Communities: the European Coal and Steel Community (ECSC), the European Atomic Energy Community (Euratom) and the European Economic Community (EEC ), to these were added the common foreign policy and judicial and police cooperation.