What factors contributed to the united states becoming a world leader? the united states winning the war and having a strong economy the allies winning the war and us having a skilled labor force the united states winning the war and german scientists sharing their knowledge the united states suffering no war damage and having a strong economy

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.

our former president bush did 9/11