The less we know about a market or subject, the more likely it is that a researcher should use: Marketing Chapter 4 The less we know about a market or subject, the more likely it is that a researcher should use: a. Causal research. b. Descriptive research. c. Exploratory research. d. Formal research. Answer: c. Exploratory research. Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+