Taylor Noticed That One of His Students Had Fallen Asleep

Taylor noticed that one of his students had fallen asleep during class. Dr. Taylor immediately thought to himself, "This student was probably out too late partying last night. Alcohol abuse is to blame for his somnolence." In reality, the student had just finished working the night shift at his job, and the interaction of poverty and hard work was to blame for his somnolence. Dr. Taylor's thinking is an example of:

A) an actor-observer bias.
B) a fundamental attribution error.
C) a hindsight bias.
D) a self-effacing bias.