Answer:
Barnum effect
Step-by-step explanation:
Barnum effect: In psychology, the term Barnum effect is also referred to as Barnum-Forer effect, or Forer effect and is defined as one of the psychological phenomenon in which a person tends to give a very high and precise description of his or her personality that are limited to him or her and considered as vague yet general that can be applied to a variety of different people. It is filled with particular information that can be applied to different people.
In the question above, Isabella has just fallen prey to the Barnum effect.