Technological advancements
A filibuster can be in place by a party, it's when a group of Senators take turns speaking. They can pass it on to other Senators, which no one can object do, and each Senator does not have a limited amount of time. They can even read from a phone book if they want to. While a Senator is talking, no one can interrupt the Senator. A vote can stop the filibuster and force a vote, called the cloture.
I think its C...lots of that kinda stuff was done in the attempt to stop communistic spread of influence.
Hyksos trade relationship
Freedom Riders= Civil rights activists, rode s bus to the southern segregated parts of the US (1961) to complain about the US court cases ( Morgan v. Virginia and Boynton v. Virginia) deciding that segregated public buses were unconstitutional, and the first Freedom Ride left Washington, D.C. on May 4, 1961,[5] and was scheduled to arrive in New Orleans on May 17.[6]