Questions $12-14$ are based on the following situation:

Edward Duprey, a student at the University of Wisconsin at Madison, recently purchased a small ice cream and fro: business close to campus to help pay his way through the program. Even though Wisconsin has cold winters, ice cI yogurt generally sell well year$-$round. After two months of operation, it has become clear why the previous owners business: Even though it seemed to be ideally located, sales were extremely disappointing.

Edward decided to apply some of the things he had learned in his marketing research class to his business. The firs should do is

a$.$ conduct store exit interviews.

b$.$ develop a questionnaire.

c$.$ identify a sample frame.

d$.$ define the problem to be researched.

e$.$ collect secondary date.

Clear my choice