Brain damage is thought to produce the symptoms of schizophrenia. positive negative mood concordant cognitive

First, let's analyse the options:

Since we're talking about brain damage, there is nothing positive nor cognitive that can be produced.

Since we're talking about schizophrenia, I don't see how the words mood and concordant can relate to the subject.

So the most logical answer is "negative". Brain damage is thought to produce the negative symptoms of schizophrenia.

Hope it helped,

BioTeacher101