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.
The person they are questioning was told that if the subject got the answer wrong, they would press a button that would shock the subject, hope that helped!1
“Carrots are a favorite food of rabbits”