Gillette$$s research and development team found that Indian men are not willing to discuss how they use razors in a group setting because they view it as a sensitive topic. In order to gather detailed information about razor usage through a one$-$on$-$one interaction between an interviewer and a respondent, the team decided to conduct:

Question $7$Select one:

a$.$

experiments

b$.$

focus group research

c$.$

interviews

d$.$

observational research