Who sailed around the southern tip of africa in 1488?

In his speech how does kennedy build his claim that the united states will defend freedom in its hour of maximum emergency? a.by arguing that the u.s. must enforce international law across the world since the united states is the lone superpower in the worldb.by demonstrating that the poverty which many people suffer from is an obstacle to true freedom  c.by stating that the u.s. will play an active role in fighting groups that are opposed to freedom, and by supporting groups that are fighting for freedom  d.by demanding that the adversaries of the united states be more willing to negotiate, or else there will be war

Look at the graph. where p is price and q is quantity, what might cause a move from b to a?

Plz which of the following statements is the best definition of a blockade? a. a blockade is a group of soldiers recruited from a foreign country who serve for the money. b. a block it is a military tactic in which one army moves into place to face another army. c. a blockade is a wooden fence built to defend a colonial settlement. d. blockage is the shutting off of a port by ships to keep people or supplies from moving in or out.