Which One of the Following Students Is Attributing Success or Failure

Multiple Choice

Which one of the following students is attributing success or failure on a geology test to an internal source and thinks the cause is unstable and controllable?

A) Jane said she failed the test because it was too difficult.
B) Duncan said he did well on the test because he studied hard.
C) Emily said she did well on her test because she is smart in science.
D) Joe said he studied hard, but he failed because he is just not good in geology.