Which of the Following Statements Represents a Possible Measure of Success

Which of the following statements represents a possible measure of success in the "define the problem" stage of the marketing research process?

A) You have three weeks and $10,000 to determine if it is going to be profitable to serve breakfast on weekdays or not.
B) If three year olds like this, then it stands to reason four-year olds will like it even more.
C) If observations show that children like Toy A more than Toy B in terms of hours spent playing with it, then we will move ahead with making Toy A.
D) Let's identify the most cost effective method of advertising.
E) Use mail questionnaires, not focus groups.