According to the Study Conducted by Rosenberg Et Al, What

According to the study conducted by Rosenberg et al, what did the study on coronary patients undergoing the Type A Structured Interview show?

A) The blood supply to the heart muscles was more likely to be obstructed when patients displayed facial expressions of anger.
B) Facial expressions of anger had no bearing on the blood supply to the heart muscles.
C) The blood supply to the heart muscles increased when patients displayed facial expressions of anger.
D) Patients displayed facial expressions of anger when they experienced increased cardiovascular activity.