Read this excerpt from "Rikki-Tikki-Tavi."

"I was not a day too soon,” he said; for he could see the baby cobras curled up inside the skin, and he knew that the minute they were hatched they could each kill a man or a mongoose. He bit off the tops of the eggs as fast as he could, taking care to crush the young cobras, and turned over the litter from time to time to see whether he had missed any. At last there were only three eggs left, and Rikki-tikki began to chuckle to himself, when he heard Darzee's wife screaming.

How does the author use personification in this excerpt?

He explains that Rikki-tikki is just in time.
He writes that Rikki-tikki begins to laugh to himself.
He writes that Rikki-tikki takes extra care not to miss any eggs.
He says that Rikki-tikki hears Darzee’s wife.