Respuesta :
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! :)
The correct answer is D. The new system will enable teachers to keep a running total of each student’s test scores, factor in attendance as part of the final grade, and calculate each student's class standing throughout the semester. Faulty parallelism is the construction of the sentence in two or more parts all equivalent in meaning but not grammatically similar in form.