Which sentence or phrase indicates a transition in the excerpt The Monkey’s Paw?

A. "At the third glass his eyes got brighter, and he began to talk"
B. "Twenty-one years of it, said Mr. White, nodding at his wife and son."

C. "The old man rose with hospitable haste, and opening the door, was heard
condoling with the new arrival."

D. "When he went away he was a slip of a youth in the warehouse. Now look
at him."