Match the Lines L1 (blue), L2 ( red) and L3 (green) with the slopes by placing the letter of the slopes next to each set listed below:

 1. The slope of line $L3$
 2. The slope of line $L1$
 3. The slope of line $L2$

A. $m=-1$
B. $m=1.6$
C. $m=0$