The right answer is C (Hail, king, for so thou art: behold, where stands/The usurper's cursed head:)
The Great Wall of China is an example of a wall used to protect a place.
The Berlin Wall is an example of a wall to keep two places separate, east and west Germany.
Either a cake nor cookies are to be served
Zoos and wildlife sanctuaries keep animals safe and preserve endangered species. Plus, they model their captive habitats to match their natural ones. They don't have to hunt or worry about dying!
(I don't agree with this LOL, free the animals!)
Answer
while is the answer to the question