Amelia failed a test and said it was because the questions were "tricky"; oscar passed the same test and said it was because he studied hard. amelia is using ; oscar is using a dispositional locus of control; a situational locus of control the fundamental attribution error; the self-serving bias the self-serving bias; the self-serving bias external self-efficacy; internal self-efficacy

The correct answer is the self-serving bias; the self-serving bias.
Both of them are trying to explain why they did the test the way they did it - Amelia failed, and she wanted to excuse that failure and blame it on the tricky questions; on the other hand, Oscar passed the test, and his explanation for that was that he studied hard for it. Both of them are biased towards their results and are trying to find reasons for them.

Iwould say the answer would be b