Which of the following occurred after the Berlin Wall fell? OEurope remained divided among ideological lines.
O The European Union collapsed.
OAll European nations became members of NATO.
O Much of Europe formed a single economic market.

Much of Europe formed a single economic market

Explanation:

Nowadays Europe isn't very much divided among ideological lines. I don't believe there are any communist countries in Europe as the Soviet Union ended up collapsing, and along with that, their communism.

The European Union hasn't collapsed. Britain recently left the European Union (Brexit), so the EU still exists.

Not all European nations are part of NATO. Switzerland, for example, is a very neutral country and they are not part of NATO. Some of the Balkan countries didn't join as well.

Much of Europe has formed a single economic market. A majority of European countries use the euro, so a good portion of Europe had formed a single economic market.

Have a wonderful day! :D

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.