Respuesta :
Answer:
a. the fundamental attribution error.
Explanation:
According to my research on studies conducted by various sociologists, I can say that based on the information provided within the question this is consistent with the fundamental attribution error. This is a concept that states that individuals tend to emphasize other people internal characteristics/aspects rather than external factors, when explaining people behaviors/actions. Which is what Ralph is doing by immediately assuming the customer is an "idiot".
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.