Recognizing key facts about the opposite of the opposite of a number, which of the following statements is correct

It is correct to say that the opposite of the opposite of a number is the original number itself.

To recognize key facts about the opposite of the opposite of a number, there is only one statement that is correct:

The opposite of the opposite of a number is the number itself.

In mathematical terms, if we have a number x, then the opposite of x is -x, and the opposite of -x is x. Therefore, the opposite of the opposite of a number is the number itself.