Look at these tiles.

Haley puts these 12 tiles in a bag and shakes. Then she pulls out a tile at random.

What is the probability she picks a tile that is a multiple of 3?
A. $\frac {8 }{4 }$
B. $\frac {8 }{12 }$
C. $\frac {4 }{8 }$
D. $\frac {4 }{12 }$