Factor Out the Greatest Common Monomial Factor of the Polynomial $y ^ { 2 } + 9 y$

Multiple Choice

Factor out the greatest common monomial factor of the polynomial below, if one exists. $y ^ { 2 } + 9 y$

A) $y ^ { 2 } ( y + 9 )$
B) $y ( y + 9 ) ( y + 1 )$
C) $y ( y + 9 )$
D) $y ( y + 9 ) ^ { 2 }$
E) no common factor other than 1