Answer: a COVER-UP
Context/detail:
"Watergate" was the scandal in which persons working for President Nixon's reelection campaign committed crimes to spy on their opponents at Democratic party headquarters, and then efforts were made to cover up those crimes. Nixon didn't directly order the break-ins and spying attempts, but he did order the cover-up of his administration's connections to those activities.
The first break-in attempt by burglars working on Nixon's behalf occurred in May, 1972, as persons connected to the Nixon reelection campaign broke into the Democratic National Committee office in the Watergate complex of buildings in Washington, DC. They were planting wire-taps on the Democrats' phone lines, and also stole copies of documents. When the wire-taps didn't work properly, they broke in again (in June) to try to fix the surveillance devices, but they were caught.
Nixon's role in Watergate was especially in his efforts and those of members of his staff to cover up what had happened. Ultimately, the Watergate affair brought down the Nixon presidency. He resigned in order to avoid impeachment. And the whole affair made Americans more distrusting of government.
B. The expulsion of non-Christians from Spain.
The Reconquista had the ultimate effect of driving Muslims out of the Iberian Peninsula, and contributed to the unification of a single Spanish kingdom.
Muslim incursions into the Iberian Peninsula had happened already back in the 8th century, and Muslim populations controlled the southern portions of Spain and Portugal for many centuries. "The Reconquista" is the name given to the retaking of the lands by Portugal and Spain, completed in 1492. Following that, there were efforts to force Muslims to convert to Catholic Christianity if they wished to remain in the land. [Jews were targeted also.] The Reconquista had been pursued on and off since the 8th century, but was most aggressively--and successfully--carried out by the monarchy team of Ferdinand and Isabella, who completed the conquest over Muslims in Grenada in 1492.
Ferdinand of Aragon and Isabella of Castile had joined their kingdoms by marriage to one another in 1469. Their success against the Muslim presence in the peninsula advanced their control over all of Spain. Under their son, King Charles I, Spain was ruled as a single kingdom. (Charles is perhaps more famously known also as Holy Roman Emperor Charles V, as he held that imperial title also from 1519 to 1556.)
Started the amerian revolution
<span>Assassination of kennedy in Dallas Texas</span>
violates the First Amendments freedom of speech