Answer:
c. Leonard attributes earning a good grade in his psychology class to the fact that he is an exceptionally hard working student who is also incredibly smart.
Step-by-step explanation:
Already self-serving bias is the kind of bias that makes us overstate our own importance, making us believe that a good thing happened because we are extremely and naturally wonderful, unique and perfect. An example of this can be seen when Leonardo believes that he got a good score in his psychology class because he is an exceptional and extremely intelligent student, while in fact Leonardo got good grades for striving and having a good teacher.