Answer: (D) amygdala.
Explanation:
Situations that are particularly emotionally draining or stressful are very likely to become long-lasting memories.  Arousing or extremely anxious situations can activate the Amygdala´s limbic system,  increasing activity in the memory-forming regions of the brain.Â
Stress hormones discharged by the adrenal glands are vital for the consolidation of emotionally exciting or shocking memories.Â