Answer: B (point of view)
Explanation:
Let's go through all the answer options.
A) time of day
The time of day isn't exactly the most important detail, since the story usually takes place over different days, months, or years. The exact time isn't the key point in the story.
B) point of view
This is a pretty important topic, since it influences "how the story is told", which is part of the question.
C) first name of character
While this is nice info to have, it does not affect the way a story is told. It is just a minor convenient detail.
D) camera angle
This one doesn't apply at all since it's a book, not a movie. There are no cameras involved.
Therefore, the best answer is B!
Hope this helps! :)