Concept checking is the process of a teacher asking questions to their students to make sure they understand the vocabulary/grammar you have taught them. =)
Answer:
I'm 1000 percent certain it's A
So, Colton has problems remembering because he crams before the test: he should probably change this habit, and do the "opposite" of cramming: study <span>a little every day.
Actually, studying a little bit every day is shown to give better results that a lot at once, even if the total time is shorter! </span>
The author's loved one will always remain beautiful in the lines of this poem.
Hope this helps!