The answer would be the availability of new farming land in the west, while back east, most of their land had already been taken.
The correct answer here is the last option
Mahan argues clearly that a strong navy is required in order for United States to expand far beyond its shores and its territory in order to become a super power. Manifest Destiny is a belief that first referred to the destiny of the settlers to spread across North America and later beyond. Here Mahan says that in order to do that the government needs to provide supply points for its navy.
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Answer:
Born in Wesel circa 1580, Peter Minuit joined the Dutch West Indian Company in the 1620s. Named director of the New Netherland colony in 1626, he is said to have negotiated a deal for the island of Manhattan with a Native American tribe and helped develop a profitable fur trade in the region.