Tiffany has a hard time trusting other people her age because she believes they are irresponsible. Accordingly, when she makes dinner plans with one friend, she also makes backup plans with someone else, and she goes to one or the other. Her friends soon in turn begin to "blow off" their arrangements since it is not clear whether or not Tiffany will show up. Tiffany has created .a. a confirmation bias.
b. a self-fulfilling prophecy.
c. counterfactual thinking.
d. controlled unbelieving.

Tiffany has created a self-fulfilling prophecy. The correct option is B.

Explanation: self- fulfilling prophecy is created when an individual expects or believe a particular thing to happen and this expectations occurs due to the individuals behavior.Self-fulfilling prophecy has to do with our psychological way of thinking and how it eventually affects our actions. Because Tiffany has an already concluded mindset that people she dates are irresponsible. That what led to her actions of double dating. Her dates in turn started "blowing her off " because of her short comings. I hope this help. Thanks.