Factor Out the Greatest Common Monomial Factor of the Polynomial $3 x ^ { 3 } y ^ { 3 } - 6 y$

Multiple Choice

Factor out the greatest common monomial factor of the polynomial below, if one exists. $3 x ^ { 3 } y ^ { 3 } - 6 y$

A) $3 y \left( x ^ { 3 } y ^ { 2 } - 2 \right)$
B) $3 x \left( x ^ { 2 } y ^ { 3 } - 2 \right)$
C) $3 x \left( x ^ { 3 } y ^ { 2 } - 2 \right)$
D) $3 y \left( x ^ { 2 } y ^ { 3 } - 2 \right)$
E) no common factor other than 1