He probably did that to: A, make it easier to pick out the more important characters, and B, show that the commoners spoke simple and succinct, whereas the nobles were more educated, and, as such, had a prettier way of speaking. Hope this helps!
Whats the press release you read?
Answer:
Removing Cassio would make things simpler and would serve as "sweet revenge" for Roderigo; he agrees because Iago convinces him that if he kills Cassio, he will be able to have Desdemona.
Explanation:
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