When the european union formed, nations began to a.)create one unified education system. b.)eliminate their home governments. c.)cooperate on law enforcement. d.)abolish many geographic boundaries.

When the European Union formed, nations began to : C. cooperate on law enforcement.

When European union is formed, they need to make spread the awareness that there would be new regulations regarding their relationship with other union members (such as new migration regulation, new trading regulation ,etc)  They cooperate with their law enforcement to ensure that the people got this message.

the completion of the erie canal spurred the first great westward movement of american settlers, gave access to the rich land and resources west of the appalachians and made new york the preeminent commercial city in the united states.