B. A possessive noun should have its instead of it's (which is a contraction for it is).
For A. Diana is a singular noun and the apostrophe should come after the r instead of after the s.
For C. The duck would've dunked ITS instead of IT'S beak since it is possessive.
For D. You do not need to put an apostrophe since theirs is already a possessive noun.
I would start it off on what you will be talking about. For example, you could begin with what books and ebooks are both used for.
In the first body paragraph, you explain one reason why you believe ebooks are more useful. In the second paragraph, explain why other people may disagree, and then emphasize on why you think differently.
In a few more paragraphs, list more reasons that support your point of view and do your best to persuade the audience to agree with you. Hope this helps!
Answer:
Third Person Omniscient
Explanation:
Having full details of the story, speaking in third person.
Either do not reply or talk about other things and offer 'many thanks in regards to your generous offer'