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! :)
I believe it's being able to write for various contexts. It'll help you become a better writer.
Answer:
When I was playing baseball with my friends, the new kid on the block showed up. He was super bossy, and super controlling. He came in and ruined the game. Instead of getting mad, I made sure to be friendly with him so we all could finish our baseball game with no conflicts.
Personal opinions and one-sided answers.
