This is a question with answer options. Goal: How do I break a cake apart in order to make cake pops?

Which of the following methods is more reasonable for accomplishing this goal?

(I) You can put the cake in a heavy duty zip lock bag and break it up in there. We want to get the crumbs pretty fine.; (II) You can put the cake in a heavy duty trash bag and break it up in there. We want to get the crumbs pretty fine.;...I think the answer is
(I)