Answer:
c.
Step-by-step explanation:
- She has studied a lot and still she has failed her last two tests so spending more time preparing for the economics tests is not really a good option.
- Retake the course with a different instructor would imply that the professor she has now is a factor that is influencing in her grades which doesn't seem to be the case.
- Change to a different major shouldn't be an option because this is a very dramatic option and the fact that she has failed her tests doesn't mean she's bad at business.
- Therefore, the most suitable option would be that she finds students who are passing and study with them, when a group works together, they usually have a better learning and also she can learn new techniques to study as well as getting feedback from the rest of the students.
Thus, the correct answer is C.