I believe the answer is D. Before, because Also and During would make it grammatically incorrect and if you consider the fact that they were able to, "see and hear the explosion," then Eventually would not fit because that makes it sound like it took a bit of time.
Answer:
Don't worry about them, girl. Focus on yourself and work for your goals.
Explanation:
B.
until - until he comes for example ( time before someone comes or something is happened)
Meanwhile - during a period or an action where another thing is happening (at that time)
Later - after some period - two months later ( after passing of some amount of time
