In the discussion about the marketing research process, developing a research plan involves one or more of the following: I. taking stock of sources of existing data II. looking into existing customer data, for example, as maintained by the marketing intelligence system III. figuring out a way to collect new data if needed

Group of answer choices

Only statement I is true

Only statement II is true

Only statements I and II are true

Only statements II and III are true

Statements 1, II, and III are true