What should be noted in the header if lengthy colloquy occurs between an attorney's examination and opposing counsel's questioning?

The correct choice highlights the importance of marking the header as "Intervening Pages" when there is a lengthy colloquy between an attorney's examination and opposing counsel's questioning. This designation is crucial in the transcription process as it helps signal to the reader that there has been a significant shift or break in the dialogue that may not be part of the main examination sequence.

Using "Intervening Pages" effectively communicates that additional content, such as exchanges of legal arguments or procedural discussions, has taken place. This ensures clarity and maintains the structural integrity of the transcript, making it easier for those reviewing the document to follow the context and sequence of the proceedings. It also aids in distinguishing sections of the transcript for better navigation and comprehension, which is particularly important in legal documentation where accuracy and clarity are paramount.

Other choices, like "End of Examination," "Jury Instructions," or "Objection Raised," do not accurately reflect the need to indicate breaks or shifts in dialogue related to intervening discussions that occur outside the main examination. They serve different functions in legal documentation and would not correctly represent the scenario described in the question.