Solve Using the Addition and Multiplication Principles $-2-6 a-6 \geq-7 a-20$

Multiple Choice

Solve using the addition and multiplication principles.
- $-2-6 a-6 \geq-7 a-20$

A) $\{\mathrm{a} \mid \mathrm{a} \leq-12\}$
B) $\{a \mid a>-6\}$
C) $\{a \mid a \geq-12\}$
D) $\{a \mid a<-6\}$