Which One of the Following Girls Is Most Likely to Attribute

Multiple Choice

Which one of the following girls is most likely to attribute a low exam grade to an external cause?

A) Anna's teacher encourages her to seek his help if she needs it.
B) Betsy knows that other students in her class all did well on the exam.
C) Carol usually does well on tests but knows that this time she didn't study as much as she should have.
D) Donna thought she knew the material even though she really didn't.