Factor the GCF Out of the Given Expression $5 x^{2}+15 x$

Multiple Choice

Factor the GCF out of the given expression.
- $5 x^{2}+15 x$

A) $5 x(x+3)$
B) $5 x(x+15)$
C) $x(5 x+15)$
D) $5 x^{2}(x+3)$