You work on covering any possible entrances with scraps of metal and wood lying all around the place. This proves very worthwhile as the mass of undead slowly turns away one by one and return to whatever zombie things they do. Probably going bowling or something. Time passes and you are left mostly just fiddling your thumbs. After a few hours, there's a knock at the entrance. You are left unsure what to do.

A) Peek out (6 C A)
B) Walk out like the B.A. you are (6 C B)
C) Stay silent and do nothing (6 C C)