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! :)
Answer:
Endowed with commonsense, as massive and hard as blocks of granite, fastened together by stern rigidity of purpose Endowed with commonsense, as massive and hard as blocks of granite, fastened together by stern rigidity of purpose. On the score of delicacy, or any scrupulousness which a finer sensibility might have taught him, the Colonel, like most of his breed and generation, was impenetrable.
Explanation:
Hope this helps!!!
this does not give me good detail i need more to help u
