When Eurasia restaurant, serving Eurasian cuisine, first opened along Chicago$$s Michigan Avenue, its novelty brought many diners. However, it turned off the important business lunch crowd, and sales went into decline. Before conducting any marketing research to explain the declining sales, management needs to:

Question $1$ options:

determine who will be most likely to respond to a survey

select a market sample from everyone in the population

define the problem to be researched

develop a survey to find out exactly what's wrong

enumerate the decision factors