Either because of what she did because so everyone wont have to worry about Juliet going to romeo or if romeo and Juliet got separated and got sad because of that.
Iambic pentameter is considered a more refined and eloquent way of speaking where as prose/ blank verse shows a very common or uneducated way of speech.
I would say that the last choice would be correct. Hope this helps!
Parents and school board wanted the book banned because they thought the book was unsuited for the age group of high school students.