Which of the following reasons is the best possible explanation for the changes and europe's population's since 1750,s

the french gave their support to another tribe during he war.

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.