What does "subpoena ad testificandum" require a witness to do?

"Subpoena ad testificandum" specifically requires a witness to testify in court. This legal term refers to a command for a person to come before a legal authority and provide oral testimony regarding the matters at hand in a case. The purpose of this type of subpoena is to ensure that individuals with relevant information are compelled to share their knowledge, thereby aiding the court in its decision-making process.

The other options involve important aspects of legal procedures but focus on different aspects of a witness's obligations or courtroom processes. Providing documents relates to a different type of subpoena known as "subpoena duces tecum," which requires the production of evidence. Appearing in front of a jury is related but is not the specific requirement of a subpoena ad testificandum, as such a subpoena can require testimony in various contexts, not just jury trials. Finally, while taking an oath to tell the truth is a critical part of the testimony process, it is not what the subpoena itself mandates but rather a procedural step that follows when the witness actually testifies.