​Based on Research by Sheldon Cohen and Colleagues, Which of These

Multiple Choice

​Based on research by Sheldon Cohen and colleagues, which of these people is more likely to catch a cold if they are all exposed to someone who has it?

A) ​Wanda, who goes to bed and gets up at the same times each day
B) ​Xavier, who is very friendly and regularly interacts with others
C) ​Yolanda, who feels and expresses gratitude and joy in life daily
D) ​Zvi, who has just succeeded in coping with divorce and custody