Hey, the answer to the question would be "subordinate conjunction"
When joining two independent clauses with a comma, a subordinate conjunction needs to accompany the comma.
Answer:
The key to building suspense is making readers care about characters they slowly learn more about.
maybe something like,
What was going through your mind when this event occurred?
What made you want to keep going after the event?
What is some advice you would give to other survivors?
Hope this helped..
It’s most likely B.
A doesn’t have a full stop. C has no full stop and a random capital letter. D just isn’t a question, so it shouldn’t have a question mark.