Answer:
a. An external attribution
Step-by-step explanation:
External attribution: The term external attribution is also referred to as situational attribution, and is defined as an attribution that different people infer an individual's behavior are the result of the external or situational factors.
In other words, external or situational factors are the factors that affect behavior or an event.
In the question above, Kayla is making an external attribution about the cause of her low paper grade.