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 dialect makes it easier for the audience to picture out the setting of the story. The dialect makes the setting more descriptive and makes the story more vivid and easier to understand. The author also uses symbolism to tell the lessons of Trifles.
I think it's C
Hope it was right