In these lines, Duncan is very grateful and complimentary towards Lady Macbeth, thanking them for letting him stay there and complimenting how nice the castle is. Lady Macbeth is very overly sweet, which the audience knows is because she intends to kill him) and feels a lot more forced in her dialogue as she tries to praise him.
The Boer war was fought between the British and the Dutch settlers
I believe C is the answer as President Kennedy talks about defending freedom and doesn’t only mention America, but also citizens of the world.
Hope it helps (:
