Answer:
Based on research on the situational determinants of cooperation, Trina is more like to share notes with - A. Randy, who often studies with Trina.
Step-by-step explanation:
Here Trina is presented with a dilemma of deciding whom to help by sharing her notes. According to the research on situational determinants of cooperation, in such situations individuals are considering both fairness toward all individuals separately and general good for the group.
Trina chooses Randy because she believes that he both needs and deserves her notes more than other members of the group. For example, Trina would not share her notes with Sean, because he probably does not need them as much as others. Conversely, she would not share notes with Kelly, because she believes that Kelly does not deserve them.