Final answer:
The difference between quantitative and qualitative market research is that quantitative research relies on primary research while qualitative research relies on secondary research.
Step-by-step explanation:
The main difference between quantitative and qualitative market research is that quantitative research relies on primary research while qualitative research relies on secondary research. Quantitative research uses statistical techniques to analyze data collected from large sample sizes, while qualitative research seeks to understand human behavior through in-depth interviews and analysis of content sources. Therefore, option 1) is the correct answer.