I'd say B.
It wasn't the last battle that's for sure, and there were not that many American casualties.
The Northwest Passage is a sea route<span> connecting the northern Atlantic and Pacific Oceans ... Explorers </span>thought<span> that an open </span>water route<span> close to the North Pole must exist. ... While searching for </span>him<span> the McClure Arctic Expedition discovered the ... the Northern Sea </span>Route<span>), making it possible to </span>sail around<span>the Arctic ice cap.</span>
United I think that should be the answer
Answer:
It's an example of Demographic trends.
Explanation:
Demographic trend can be defined as the measurable change in the characteristics of a population over time e.g. Change in concentration of a particular ethnic group, age-group, occupation, religion, political view, sex ratio, etc.
Since the population in the U.S. is aging which means there will be an increased need for health care professionals in the future it indicates a demographic trend.
Silk Road:
The Silk Road specifically refers to the trading land routes that connects East and Southeast Asia to South Asia and Persia followed by Arabian Peninsula, East Africa and finally Southern Europe.
This network was regularly used from 130 BCE and part of that road is still in existence as a paved highway that connects Pakistan and the Uygur.
Chinese are the one who first started trading in this road and as its name indicates it is mainly used as a trade route for trading silks.
Hence this ancient road played a major role on times when it was constructed.