The correct approach is to use the Databricks CLI get command to retrieve the JSON configuration of the existing pipeline. This configuration includes all necessary settings. However, the pipeline_id must be removed because it is unique to the existing pipeline and cannot be reused. The engineer should also rename the pipeline to avoid conflicts. The modified JSON can then be used with the create command to generate a new pipeline. Option C correctly outlines this process. Other options either use incorrect commands (e.g., list does not provide full specs), involve unnecessary steps (e.g., stopping/resetting in B), or do not explicitly handle pipeline_id and versioning (e.g., cloning in D might not produce a versioned JSON file).