The US was successful in containing communism in what country

I put my answer in the question box by accident it's Western Europe and North-East Asia from the Soviet union

the answer wold be b) travel among nations should be regulated by an international organization

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.