Answer:In chapter 5, when Scrooge wakes up, he is a changed person. One change is involuntary. He is happy and excited. He dances around the house preparing for the day. At one point, the excitement gets to him, and he laughs uncharacteristically:
Really, for a man who had been out of practice for so many years, it was a splendid laugh, a most illustrious laugh. The father of a long, long line of brilliant laughs!
Dickens uses the laugh to show how overwhelmed Scrooge is by happiness and excitement.
The next example shows a voluntary change in Scrooge. The day after Christmas, Scrooge decides to pretend he is his old self again. He wants to play a joke on his clerk, Bob Cratchit, who doesn’t realize that Scrooge has changed. After giving Cratchit a scare, he reveals the new Scrooge in a dramatic fashion:
“Now, I’ll tell you what, my friend,” said Scrooge, “I am not going to stand this sort of thing any longer. And therefore,” he continued, leaping from his stool, and giving Bob such a dig in the waistcoat that he staggered back into the Tank again; “and therefore I am about to raise your salary!”
Step-by-step explanation: