Devon, an airline executive, is conducting research about customer attitudes regarding travel. He uses a survey that an industry group conducted the prior year and then personally interviews 100 customers flying during the month of May. Each customer receives a survey one month later. Which of the following statements accurately describes the sources and types of research methods Devon used and is most appropriate for displaying the results of his research? Select answer from the options below Devon is using both primary and secondary data and has employed both qualitative and quantitative research methods. His data can be best displayed using graphs and tables. Devon is using both primary and secondary data and has employed both qualitative and quantitative research methods. His data should be displayed using a combination of mind maps and graphs. Devon is using both primary and secondary data; however, he is using only qualitative research methods. His data can be best displayed using graphs and tables. Devon is using both primary and secondary data; however, he is using only qualitative research methods. His data should be displayed using a combination of maps and graphs