I think it is B because It sounds like the answer
Answer:
he was trying to decide whether what he had seen was real.
Answer:
I would say A.
Explanation:
Beginner as to novice as to expert as to master is explaining the levels of a person in knowledge.
Hopefully this is correct, and i apologize if it isnt. I answered purely on what I would answer personally.
Oh, and nice pfp and username btw!
The answer for your question would be C.
The reason why this would be your answer is because "Next,"
It is transitioning the sentence, so it would be known as a temporal word.
I hope this helps. :)