Tammy expects that she will be more likely to get a job offer if she wears red to her interviews.She wore red to each of her interviews and she got offered a job.What might have influenced Tammy's likelihood of being offered a job

A)  placebo effect 
B)  socially desirable responding 
C)  halo effect 
D)  experimenter bias

Placebo Effect

A beneficial effect produced by a placebo drug or treatment, which cannot be attributed to the properties of the placebo itself, and must therefore be due to the patient's belief in that treatment.

Halo Effect

A cognitive bias where the perception of one positive trait (like attractiveness) in a person influences the observer's judgment to also perceive other unrelated positive traits.