The best answer is A. When people know how to handle stress, they are able to live happier and healthier lives.
<em>It is the best ending statement as it gives positive idea to the idea. Rather than ending the sentence in a negative way, this statement emphasize the importance of handling and managing stress. The sentence is simple but full of meaning and use. </em>
The answer is 'his hair turns grayer' - that is the physical change which took place in the spirit of Christmas present from when he first appears in the story to when he leaves.
