Identify placebos in experiments.

Jane has been making coffee all week for her coworkers, but accidentally used decaffeinated coffee. Jill has been drinking and claims to feel the benefit from caffeine. Linda has not been drinking coffee and doesn't claim to feel the benefit. Marie has been bringing her own regular caffeinated coffee in for herself and says she feels the boost.

Who is experiencing the placebo effect in this situation?

a$.)$

Marie

b$.)$

Jill

c$.)$

Jane

d$.)$

Linda