Which of the following is a requirement of a Self-Contained appraisal report?

A Self-Contained appraisal report is characterized by its comprehensive nature, providing all necessary information for the intended user to fully understand the appraiser's process and conclusions. This includes the data and methodologies that were used in the appraisal, which are essential for transparency and reliability. By detailing the approaches taken, such as the valuation methods employed and specific data analyzed, the report ensures that the reader can grasp not only the final value conclusion but also the rationale behind it.

The other choices highlight components that may be relevant to various appraisal reports but do not encapsulate the full requirements of a Self-Contained report as effectively as the correct choice. Detailed explanations of the market and summaries of the findings could be part of the report, but they don't explicitly cover the need for comprehensive data and methodologies. A limited market survey is more in line with Restricted reports, which would not be applicable in this context. Thus, the inclusion of data and approaches used in the appraisal is what distinctly defines a Self-Contained appraisal report.