I think the answer would be d
B)The Middle class grew in cities
Explanation:
Urbanization in related to the creation or growth of an urban area. So B would be the best option. It could possibly be A though. Definitely not D
The United States was able to pay for the construction of the Panama Canal by negotiating and financing land treaties with the governments of Panama and Columbia. The treaty came to be known as Mallarino- Bidlack treaty. This was a very important treaty for the Americans as they got the control of the Panama Canal.
