Answer:
Two days after sealing off free passage between East and West Berlin with barbed wire, East German authorities begin building a wall—the Berlin Wall—to permanently close off access to the West.
The way that the Erie Canal improved transportation was given the fact that it provided a cheap and efficient way to move between the Hudson River and Lake Erie.
<h3>How the canal provided cheaper transportation</h3>
This canal helped the United States by providing a boost to the economy of the country.
The Erie Canal helped to cut the cost of transportation by one tenth of the previous cost.
Read more on the Erie canal here:brainly.com/question/24602911
Answer: B
Explanation: Convince people that pesticides do much more harm than good.
