Final answer:
The best demonstration of the fundamental attribution error is option A, where Irina's father concludes she is an irresponsible driver based solely on the speeding ticket, overlooking any other possible reasons.
Step-by-step explanation:
The fundamental attribution error that occurs when a person attributes someone's behavior to their character or personality, while underestimating situational factors. In the context of the question regarding Irina's speeding ticket, the answer that best demonstrates the fundamental attribution error is option A. Here, Irina's father attributes her speeding to her being an irresponsible driver, ignoring any situational factors that may have contributed to her behavior.