A study was conducted by an HIM researcher to evaluate reimbursement outcomes after using computer-assisted coding. Data on the level of reimbursement as a measurable outcome using such technology were collected. The researcher also conducted focus groups to analyze questions on how or why this particular technology did not achieve expected outcomes. What type of research approach is the HIM researcher using in this study? a. Mixed methods research b. Quantitative research c. Qualitative research d. Comparative effectiveness research