15 and 16 plz help

D Questlon 15 1.5 pts Whichof the following are the main methods for conducting causal research? Test markets Surveys a and b e b andc D Question 16 1.5 pts Suppose a fast food chain wants to expand into a new market. Before making the final decision, the research team reviews a case study about another fast food restaurant that recently entered the same market. The case study contained information about the new market's demographics, traffic patterns, competitive landscape of other restaurants, and how other restaurants in the market were able to compete effectively and run a successful fast food restaurant in this market This situation is an example of which type of exploratory research? O Primary data analysis G Experience interviews e Case analysis @ Depth surveys Secondary data review 24