Yes. The punctuation is correct and it is a complete sentence. Nice job!
Complete subject: Everyone in the church.
Complete predicate: rushed out.
Answer: "Out of the dark she came, a vast dim, white , monstrous shape, directly in the Titanic's path"
Explanation: I took the test hope this helps (red sus)
Answer:
It suggests that the story will become more intense and mysterious.
Explanation: