Which of the Following Proposed Physical Markers of Personality Is

Which of the following proposed physical markers of personality is actually supported by research evidence?

A) We can generally identify people with aggressive tendencies based on facial photos.
B) Ectomorphs tend to be tall and skinny, and also tend to be introverted.
C) People with heavy brow ridges or low brow lines tend to be less intellectual.
D) People with type A blood are more extroverted than average.