12. The fragment “… and a specific network in the brain recently identified as the epicenter for Alzheimer's and dementia may be to blame …” expres...

12. The fragment “… and a specific network in the brain recently identified as the epicenter for Alzheimer's and dementia may be to blame …” expresses the idea that
a) a specific network was found and pointed as the reason for dementia.
b) dementia could be blamed.
c) dementia is caused by many reasons.
d) It’s not the first time Alzheimer and dementia are pointed in a text.
e) it’s the first time the brain network was identified.