I believe the answer is D.
The guest are happy that they are able to wall off themselves from the world containing the Red Death. They planned to live and dance in luxury until disease died out. The only thing halting their excitement was the ominous clock chimes where all would stop until it ended.
So based on your question that states a few trees in garden and one of them is a pear tree, there are pears. But a strong wind blew, there were neither pears on the tree nor on the ground. I think the best explaination to this statement is that some one might pick up the pear tree or it can be that its the wrong tree that is blown.
He had social achievements to showcase. hope this helps.
D. Intended to show feeling