I'm choosing option 2!
Number three may be a good hiding spot, but I suspect that there might be a sniper there, due to the mention of them earlier in the story. And option number one might be a good place for finding small, essential items, but if someone's in there, the it would be suicide, so if I knew for sure that no one was in there, the that would be my choice, because of the essentials it might hold, and because of how easy it would be to guard it.

The flower shop might have larger, secondary supplies, and it would be easier to get in there without being noticed, and to escape if there is someone in the flower shop. So, my choice is going to be flower shop. Of course if there was someone in the shop, then I doubt that there would be a storyline where I get back out.

Well, only time will tell.