Question

read the source of the allusion.
the ancient roman scholar pliny the elder relayed an unbelievable story in which the iliad (a poem hundreds of pages long) was written on parchment paper and inserted into the shell of a walnut. william shakespeare later referenced this story when his character hamlet uses the phrase \in a nutshell\ to describe something that is compact.
what is the meaning of the allusion in the sentence below?
so, in a nutshell, thats the story of my monthlong trip to iceland.
in a concise way
in conclusion
in an unusual fashion

Explanation:

The source explains that "in a nutshell" comes from a story where a long poem was put into a walnut shell, and Hamlet used it to mean something compact. In the sentence about the Iceland trip, "in a nutshell" should mean summarizing the trip's story concisely, as "compact" relates to being concise. "In conclusion" is for ending, and "in an unusual fashion" doesn't fit the allusion's meaning.

Answer:

A. In a concise way