Answer: in-person research and mail research
Step-by-step explanation:
Since the organization desires to conduct research with more active control over who participates and has a large budget to pay for research, then the combination of research methods that would best suit its situation is the in-person research and the mail research.
The in-person research is vital in engaging customers more deeply on the areas of interest and also observe how they interact with the products of the company. This is vital in gaining insights which will help in growing the business. Also, the mail research can be used to ask the customers questions relating to a particular topic.