I believe C is correct, because the lack of electricity could possibly impact the character's decisions. The storm could also make it inconvenient to travel. The other options would not affect the plot.
"next" is the only one that is used mostly since "the next" sound terrible in a sentence and will automatically make you get an answer wrong if you write it in a sentence
We had to annoy her by whizzing a pebble into her flowers
I would say that they shouldn't be surrounded by a lot of white space and should have clear captions. The question of white space is one of good presentation so the visual looks like an integral part of the whole topic and having clear captions is so that the visual is well explained what it is.
