Final answer:
The key aspect of a mixed-method design is the integration of both quantitative and qualitative methods, allowing for a broad and thorough understanding of research findings. It is adaptable to various research topics and questions.
Step-by-step explanation:
The primary promise of a mixed-method design is that it integrates both quantitative and qualitative methods. This approach combines the numerical strength of quantitative data and the in-depth, contextual understanding of qualitative data. Researchers may conduct surveys to collect demographic data that can be statistically analyzed and then perform in-depth interviews to explore the reasons behind the trends. Mixed methods allow for a comprehensive analysis of predicted and unpredicted data, fitting various topics and providing a robust framework for research by utilizing the appropriate research method or combination of methods.
Given that this design integrates both numeric analysis and interpretive insights, it does not conform to Option 1, which suggests a singular approach. Rather, it explicitly avoids the exclusivity suggested in Options 3 and 4. Thus, Option 2, which articulates the integration of both methods, is the correct answer. This design is highly adaptable and suited for a substantial array of research inquiries because it can leverage the advantages of both quantitative and qualitative research data.