You are working on a game that has a grid on which the avatar of the player moves in steps.
The origin (0,0) is at the upper-left corner of the game board. Y increases toward the bottom,
while x increases toward the right.
Which code segment should you use to move the avatar of the player by 3 units to the South
and 3 units to the West?

A.
Option A

B.
Option B

C.
Option C

D.
Option D

Explanation:
http://msdn.microsoft.com/en-us/library/jj131041.aspx