Final answer:
The behavioral changes of unusual calmness and hypersexuality following a stroke suggest that the stroke affected the hypothalamus, which regulates hormonal release, emotions, and sexual behaviors.
Step-by-step explanation:
The unusual calmness and marked hypersexuality presentation probably resulted from a stroke to the C. Hypothalamus.
The hypothalamus is involved with various functions including release of hormones, regulation of emotional expression and sexual behavior.
Thus, damage to this area can lead to disruptions in these functions, resulting in behavioral changes such as hypersexuality.