The answer is D.
"Keep", "factor", and "calculate" are all verbs in the list of things the new system allows teachers to do. The other sentences are inconsistent with their list of verbs/adjectives/nouns. Thus, option D is the only one that is grammatically correct.
I am not too good at explaining, so let me know if you are still confused.
Hope this helps! :)
1. B
2.B
3.C
4.A
5.C
6.B
HOPES THIS HELPS !!!!!
when you get 2 or more answers there should be a button over each one, clicking the button marks it as brainlist answer
