I believe the answer is B.i hope this helps you.Zane
This is an example of the Pygmalion effect.
The Pygmalion effect or commonly known as the Rosenthal Effect is credited to Rosenthal and Jacobsen.
This Pygmalion effect is a type of self-fulfilling prophecy wherein you think something will happen and you may consciously make it happen.
In? I dont know im waiting so my question answered. I tried.
Answer : Because it has been repeatedly demonstrated
Explanation :