How did trade play a role in the downfall of the Mongol Empire? People wanted access to goods that were banned in the Mongol Empire.
Merchants brought in people from other nations who wanted to end the Mongol Empire.
Businesses failed, and trade slowed down so much that people left the Mongol Empire.
Trade networks carried the bubonic plague around the Mongol Empire and killed millions of people.

the correct answer is d

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.

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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.