Add Do Not Use a Number Line Except as a Check

Multiple Choice

Add. Do not use a number line except as a check.
- $-\frac{1}{8}+\left(-\frac{5}{8}\right)$

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