Answer:
Most likely that the Cynthia responded due to her treatment itself mixed with a placebo effect.
Step-by-step explanation:
New drugs and their trials may be successful, but they may also be unsuccessful. It depends primarily on the body of the person who is trying the new treatment and the drug and also depends on the type of drug itself.
The placebo effect is widely known as the false effect. The simplest example is that if someone gives you a headache painkiller and puts ordinary sugar in the capsule instead of the drug, thinking that the drug is inside is very likely that the pain will stop. So this result is called a placebo effect.
The result is that it is most likely her improvement came from a mix of treatment and the placebo effect.