Answer:
A
Explanation:
"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 A is the only one that is grammatically correct.
I think it's chapter's 4-5
<span>I felt like I could take a nap after the long day of tests that I had.</span>
