Olivia is conducting a longitudinal study on adolescence. During the first wave she interviewed each participant about their familial relationships. She used the information she obtained to develop a measure of familial relationships that she administered during the second wave of the study. In the first wave, Olivia used , in the second wave she used . Question 45 options: qualitative research; quantitative research quantitative research; qualitative research interview data; archival data archival data; interview data