Answer:
B
Explanation:
I think allusion to mythology should be looked up when the allusion seems to be Important to understanding the story.
Not that none of the other options are right as well, but this particular answer gives much more credence as to why. Reading a mythology can be confusing oftentimes, especially when trying to get a wind of it at the starting stages. It's only fair that one should look up an allusion the moment it is noticed, so as to aid oneself in understanding what is being said
