I would go with the last one, the way its described seems scary and uninviting. and for instance maybe if you were somewhere that you enjoyed or wanted to be the bug would bother you, but in this case they don't seem like an main concern.
B
Explanation:
because you can answer the question. "what was he surprised at?" at the ease
A black hole produces a strong force.
D.
The two parts are independent of each other, which dictates the use of a semicolon. "Traffic was heavy." and "We were late."
"Consequently" is a transition between the two, and requires a comma.
