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.
Acts are broken into smaller sections called scenes, which show action that is happening at a certain time in a certain place.
If you have ever read a play, written by Shakespeare, for example, you must have seen it say - Act III, Scene IV.
<span>d.) all of the above </span>
