The correct answer is sister-in-law.
I would say A. BUT I could be wrong. Sorry if I am !
The correct answer is letter A. To answer your <span>question, I must first fill you in on the background.</span><span> The phrase fragments are already completely filled with the idea. It is not alone a fragment where no idea nor thought that is being presented compared to a complete sentence.</span>
Ralph is more proper and prefers to be neat and clean. Jack is more savage and does not care about looking dirty or messy.