I am not an expert at poetry, but I know a little. That means that the peacefulness of something, someplace, or someone has...... deflated. " The quiet sands have run means that, the calmness has had a uprising, and is no more calm, or calming. I hope I helped! :-)
It is simply saying that all is now in chaos. I am assuming the part that is confusing is "the quiet sands have run." It could easily be alluding to the way that during a sandstorm, the calm sands of the surface are no longer there as the chaos of the storm casts them about.
The whole sonnet is, in my opinion, about the fact that this woman does not love the poet - she is hiding her feelings well, and thinking about somebody else. So, the correct answer could be either C or D.
