It can rule laws unconstitutional that violates rights protected in the Constitution.
B) I am just guessing, but after Jimmy Carter's administration we started making smaller cars, but it was still an issue. Since the "Star Wars" program was used as a ploy to end communism, defense spending actually went down. Republicans do not like welfare. The only other issues, republicans had was taxes. However, interest rates were at the highest during the Regan years.
The french became upset when English colonists began settling in the Ohio River Valley. In 1753 the French in Canada began building forts in the Valley. The French wanted to protect the land from the British. This resulted in the British attacking in self defense. They thought of it as the zfrench preparing to attack. This became known as the French and Indian War in the colonies. Both sides British and French were accompanied by Indian allies
The Mughal power that had controlled India had began to decline, and the English took advantage of the power struggle to gain control; also the English forces proved stronger than those of their Dutch and French rivals.