Answer:
A. reviewing trends across students from year to year
C. identifying specific concepts where improvements in teaching should be made in your current class
Both options A and C are correct. Results of large-scale assessments can provide information about trends and patterns across groups of students from year to year, which can be helpful for identifying areas where teaching methods and curriculums can be improved. Additionally, these results can also provide specific information about individual students and their performance, which can be useful for teachers to tailor their instruction to better meet the needs of their current class.