Answer:
D. How will the questions be defined?
Explanation:
When devising a market research study, one of the first steps is to define the questions of the study.
These questions should be very specific, so that the information gathered by the research can effectively answer them.
For example, a good question for a market research study is "what percentage of marke share have competitors gained over us in the last two months for these two products".
That question is very specific, narrowly defined, and can be easily answered by gathering the appropriate information.