Read the following text and choose the correct answer.

The Goose That Laid Golden Eggs

Once upon a time, there was a poor farmer. He was so poor that he had only one goose.

One day, the farmer went to feed the goose. To his surprise, he found an egg of gold. The farmer was very happy. He knew he was a lucky man.

The goose laid a golden egg every day, and soon, the farmer was very rich.

He wanted to have all the eggs at once, instead of only one egg every day.

So, one day the cruel farmer killed the goose and cut the poor goose open, but there was nothing inside her at all.

Which one is the golden egg?