AC A is wrong because the council member never says anything about evidence for or against the shoe factory. If the argument said Some council members assert that the shoe factory would be a worse shelter site, but they have provided no evidence for this. Thus, the shoe factory would be a better shelter site. Sure there's a lack of evidence, but the argument does not point it out or use it in their argument.

This is how I thought of it in my head but not sure if that'll make sense to others.