Answer: d) experience less symptom relief.
Explanation:
This is a blind research where LaToya got a placebo drug which she thought was the active drug.
Due to the PLACEBO EFFECT (patients feeling better simply because they believe they are better) there is a chance of improved symptoms in LaToya's case.
However this improvement will in the higher probability not be as good as that of those taking the active drug so LaToya will experience less symptom relief.