Which best demonstrates the placebo effect?
A. a patient who quits smoking because he thinks he is given antismoking pills but is really given sugar pills
B. a patient who feels better with an increase in sugar levels because he is given sugar pills
C. a patient who has higher electrolyte levels because he is on a saline drip
for dehydration
D. a patient who experiences an increase in blood pressure because a saline injection causes him to retain water