The correct answer is C. Dreary.
This is because Le Morte d'Arthur is full of melancholy inducing moments due to the fact that everything will fall apart at a certain point. Arthur's death, and his loss, is inevitable, so is the fall of Camelot, and of his Knights of the Round Table.
Calculators are to past generations as computers are to current generations.
How do creatures prepare for the winter sounds like a really good answer. hope i helped.
The answer is C. Appearing to be calm and relaxed