Answer:
B. qualitative
Step-by-step explanation:
In this scenario, the researcher is using qualitative measures. Meaning that he/she is focusing mostly on quality data from a select few individuals who are able to provide this unique and quality data as oppossed to focusing on a large sample group so that you can obtain large quantities of data to be able to find similarities. Usually, with qualitative data, the researcher writes a detailed report talking about the data.