When information is missing during the analysis, synthesis, and refinement of elicitation results, the most effective course of action would be to conduct further elicitation activities. This approach directly addresses the gap by gathering the necessary information from stakeholders or other relevant sources. Verifying, tracing, or validating requirements are important steps, but they rely on having complete information first. Conducting elicitation activities ensures that the missing data is acquired, enabling a thorough and accurate analysis.