A man out walking his dog makes one complete pass around a perfectly square city block. He starts at point A and walks clockwise around the block. (Figure Below)

Let  be the displacement vector from A to B,  be the displacement vector from B to C, etc.

Part A

Which of the following vectors is equal to ?

	only
	only
	only
	All of the above
	None of the above

Part B

Which of the following vectors is equal to ?

	only
	only
	only
	All of the above
	None of the above

Part C

Which of the following vectors is equal to ?

	only
	only
	only
	All of the above
	None of the above