In the given situation, Dr Jackson, a psychologist, is using a probability method of sampling.
<h3>Who is a psychologist?</h3>
A professional who has gained expertise in dealing with the study of cognizance, emotions or social behavior of humans, while also treating them, is known as a psychologist.
Hence, the sampling method used by psychologist is given above.
Learn more about a psychologist here:
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New York had a key strategic location and port. The British sailors docked their ships in the port and took over while George Washington (who was fighting for the colonies) narrowly escaped. Slowly, the colonists started winning battles in New York, such as the Battle of Saratoga, but often the colonists could not regain New York back and instead liberated Washington DC, then New Jersey and then they started planning on how to liberate New York, because it was difficult due to its heavy British presence.
Maybe tradition?
What are the choices given?
One reason would be because there could be only few oil reserves. There could be a reason for energy sources to stop if the oil reserves and the supply could be lessen, providing no energy resource. That is why the United States tries to discover new alternative energy sources that could also contribute into making energy and prevent it from losing sources.