2nd one privacy. Because they want it to be private.
The root word is D) promise
Hope this helps! :)
I believe the answer is idiom, the phrase is not comparing anything so simile and metaphor is out of the question, also personification is giving a non living thing human characteristics.
The sentence that is punctuated correctly is,
D. John and Mary's house has a large front yard.
Hope this helps. :)