It means they had highly advanced infrastructure for their time. It's worth noting that major cities like New York use very similar grid like patterns for their layout still today, in 2016.
??? In English so I can help you
If i had to choose out of these it would be B
although most of the reason they did that is because they came by boat and where too poor to move inward. Not necessarily because they liked living there.
B. After becoming president in 1961, President Kennedy pushed Congress to create the organization.
Reagan's Economic Program