The correct answer is "adverb". This is because "within the old trunk" refers to the place where it was found, not a description of the trinket itself.
Most authors make typos like the one mentioned in order to give you a clear image as to how the narrator tells the story and in what mood the theme is set.
Hope this helps!
The correct answer is A.
The ideas in this sentence are not coordinated at all. They are merely two sentences linked by the conjunction "and."
In order to coordinate it correctly, a more appropiate conjunction should be added. One possibility would be the word "also."
