B
A is off right away because that is the first definition of document. Although b and c are both verbs, b simply makes more sense and is the obvious answer.
1) the children are watching a documentary now
2)bruce did not have a pet when he was a child
3) sauroposeidons are the largest dinosaurs that ever lived
4) the museum usually opens at 9:00
5) patrick loves to play chess with his friends
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>
Man's conflicts with his environment are his ENVIRONMENTAL conflicts