$19)$ Maria Ramirez is conducting research to determine consumers" personal grooming habits.

Because of the personal nature of many of the survey questions, Maria wants to select the contact method that is most likely to encourage respondents to answer honestly and that will allow her to easily collect large amounts of data. Which of the following is best suited to meet Maria's requirements?

A$)$ mail questionnaires

B$)$ telephone interviews

C$)$ individual interviews

D$)$ focus group interviews

E$)$ immersion group discussions