Solve Using the Multiplication Principle $- 6 a < - 24$

Solve using the multiplication principle.
- $- 6 a < - 24$

A) $\{ a \mid a > 4 \}$
B) $\{ a \mid a < - 4 \}$
C) $\{ a \mid a < 4 \}$
D) $\{ a \mid a > - 4 \}$