Factor Out the GCF from the Polynomial $18 \mathrm { p } + 9 \mathrm { q } - 9$

Multiple Choice

Factor out the GCF from the polynomial.
- $18 \mathrm { p } + 9 \mathrm { q } - 9$

A) $9 p ( 2 + q - 1 )$
B) cannot be factored
C) $9 ( 2 p + q - 1 )$
D) $9 ( 2 p + q )$