Mashaal Masha
Which expression is equivalent to $6x^{8}y^{2}+12x^{2}y^{2}$?
Difficulty: Medium
A: 

$6x^{2}y^{2}(2x^{6})$

B: 

$6x^{2}y^{2}(x^{4})$

C: 

$6x^{2}y^{2}(x^{6}+2)$

D: 

$6x^{2}y^{2}(x^{4}+2)$