Most people recall where they were when they heard shocking news, and recall a normal Tuesday hardly at all. Which structure explains the difference, and what is it doing?

C. The amygdala, which tags the event as significant while encoding

The hippocampus writes the memory; the amygdala marks it as worth writing well. Patients with amygdala damage lose the emotional advantage and keep normal memory for neutral material. One caution: these memories feel far more accurate than they are, vividness and accuracy are strengthened separately.