You are a refining a prompt over several iterations.

Under the objective Iterate prompts to improve output quality , managing prompt development requires maintaining baseline versioning and avoiding cumulative degradation.

When successive prompt revisions introduce drift, unintended behaviors, or progressive degradation away from the target output template, continuing to add modifications on top of an already degraded prompt only exacerbates the issue. The appropriate engineering practice is rollback: reverting immediately to the historical version that yielded the highest quality baseline (Option C) and resuming disciplined, single-variable iterations from that verified state. Discarding all historical prompt versions (Option A) loses valuable context, making multiple erratic modifications simultaneously (Option B) creates further unpredictability, and accepting substandard output (Option D) fails quality assurance standards.