The answer is "c. He thinks attending such an elegant affair will make Mathilde happy."
D because that sounds rude
I would say (You will never be happy if you continue to search for what happiness consists of. You will never live if you are looking for the meaning of life) Have a nice day Hope this helps !!!!
The sentence that uses the comma correctly is
B. Shivering from the cold, we decided to kindle a blaze in the fireplace.
Here's how the others should be written.
A. While you are waiting for the snow to melt, please do not run on the sidewalks.
C. After the storm, many inches of snow had accumulated on the lawn.
D. Oh, let's make some hot cocoa in the kitchen.
Hope this helps.