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! :)
Everything because the people were not as Intelligent as today
Answer:
B. the emotional response a text generates from a reader
Explanation:
Basically, the author creates the atmosphere in literature using description. Atmosphere helps readers to experience the story more vividly and realistically. Readers might connect more deeply to the story since these description allows them to experience the same things as the characters. Becoming more involved with the story brings emotional response from the reader making the reading experience more complete and compelling.