Answer:
The answer is: a self-fulfilling prophecy
Step-by-step explanation:
A self-fulfilling prophecy happens when an individual expects something to happen, and that situation does happen because the individual believed in it and his behavior was influenced by that. A person's expectation about other people will make those other people behave in a way that confirms those expectations.
For example, if I'm convinced that science class is extremely difficult and very few students get good grades, I'm probably not going to do very well in it.