When I did my first reading in class, my first choice was literal D. In my view, when talking about teachers' difficulties in reflecting, the text referred to the need to set realistic goals to improve their practice. However, after a critical review with our teacher, it became clear that the main criticism did not focus on setting goals, but on the lack of depth in understanding what happens in the classroom. So the correct answer was literal C. I think that for the next reading, I should be more conscientious and focus on understanding the question so as not to digress with my answer or doubt whether it is correct or not.