How did portuguese explorer bartholomeu dias seek a route to asia in 1460?

What would lead a historian to consider two events to have a relationship of correlation rather than causation?

According to thomas hobbes concept of the social contract, what do people exchange for the protection by the government?

Which of these would have been a goal of the ku klux klan in the south during reconstruction? a) registering more potential rural voters b) making sure reconstruction went smoothly c) assisting the scalawags and carpetbaggers d) restoring southern democrats to political power