_____ Compared the Immune Systems of 26 People Whose Spouses

_____ compared the immune systems of 26 people whose spouses had died 8 weeks earlier with those of 26 matched control group participants whose spouses had not died. Blood samples revealed that lymphocyte functioning was much lower in the bereaved people than in the controls.

A) Bartrop and colleagues
B) Baron von Münchhausen
C) Ambroise-Auguste Liébault and Hippolyte Bernheim
D) Holmes and Rahe