Ray decided to conduct a research to explain an issue, but it turned out that this would not be adequate in a single step. Thus he planned a sequential explanatory research design for his research. Which methods and sequence do you advise him to employ to fulfill this purpose? *

Qualitative methods followed by quantitative methods

Qualitative methods followed by quantitative methods followed by quantitative methods

Quantitative methods followed by qualitative methods

Qualitative methods followed by quantitative methods followed by qualitative methods