Final answer:
Joseph asked his brothers to bring their youngest brother, Benjamin, to Egypt to confirm that their words were true, which is a narrative from the Bible.
Step-by-step explanation:
The question refers to a biblical narrative in which Joseph's brothers must prove their honesty to Joseph in Egypt. The correct answer to the question is that the brothers must bring their youngest brother, Benjamin, to show that their words may be confirmed. This request by Joseph is not exactly listed among the options provided, so none of the options (a document, a witness, a gift, a sign) is correct in this context. However, typically in the biblical story, bringing the younger brother acts as a sign of their truthfulness. To ensure that you understand the core of the issue, the demand made by Joseph was a test to verify their honesty and to see if their behavior towards Benjamin was different than their earlier betrayal of him.