Manifest Destiny is the belief that it is the god given right for America to expand their power from "sea to shining sea." The sea to shining sea refers to the land between the Atlantic and Pacific Ocean.
This term coined by John O' Sullivan helps to explain why America bought land from other countries (like France and Spain) and fought wars against other countries (like Mexico) during the 19th century. Overall, Manifest Destiny helped the US gain numerous states like Texas, Florida, Arizona, California, Colorado, Utah, New Mexico, etc. </span>
Manifest destiny Was a widely held belief in the United States that its settlers were destined to expand across North America. Championed by president Polk, the USA based the manifest destiny on three themes, such as special virtues,and the essential duty of the American people to redeem the west given by God.
D, because a similar situation happened in the 60's when the Soviet Union tried to install nuclear armaments in Cuba when the U.S installed it's own arsenal in Turkey.
The correct answer is salutary neglect. The name of the policy came from a speech that the philosopher Edmund Burke gave to Parliament in the 1700s. A policy then emerged wherein the colonies were, more or less, left alone. Certainly more than they would have been as a subservient colony to the Crown.