Barry Received an a on His First Group Project

Barry received an A on his first group project.He believes this grade is the result of his superior intelligence and hard work.He received a D on his second group project,and he attributes this grade to the other group members' poor work and stupidity.What attributional error is Barry demonstrating?

A) The fundamental attribution error
B) A self-serving bias
C) The actor-observer effect
D) Unrealistic optimism