I think that they all had some type of practice of the things at this part
A comma should be after each separate things you are listing. The answer is:
<span>
The
Library of Congress is home to the world's most extensive comic-book
collection, oldest original newspaper collection, and most abundant
collection of cartographic items.</span>
Trivial means to be of little value, so i’d say the answer is D. unimportantly
The author was holding it till last to build suspense . the answer will be d
Dispose of, throw away, throw out, clear out, discard, scrap, dump, jettison, divest oneself of