What best defines the freeport doctrine?

Which of the following was an effect of the black death? people developed greater religious tolerance as they united in prayer. peasants migrated into large cities seeking medical care. there were large increases in wages and prices throughout europe. doctors trying to stop the epidemic made rapid advances in medicine.

What motivated germany to make an alliance with austria-hungary?   a.  fear of aggression from the united states      b.  fear of aggression from france      c.  the desire to invade russia      d.  fear of aggression from england

What was martin luther king, jr., referencing in the passage that brought him to lead a protest in birmingham?