The correct answer is all of the above - dictionaries, thesauri, grammar and usage handbooks all came about because of the shifts and changes in word meanings.
Answer:
It would show that you didn't just read something from one source and believed it. When researching it is good to read around and see different results or if the information may be the close to what you gathered elswhere etc.
Been is a being verb idk if that helps or not I don’t really know what you’re looking for
