Add Do Not Use a Number Line Except as a Check

Multiple Choice

Add. Do not use a number line except as a check.
- $-\frac{5}{6}+\frac{2}{3}$

A) $-\frac{1}{6}$
B) $-\frac{3}{2}$
C) $\frac{4}{3}$
D) $\frac{3}{2}$