Which type of research would be most appropriate in the following situations, and why?

a. A fast-food restaurant wants to investigate the effect that children have on the purchase of its products.

b. A business hotel wants to gather some preliminary information on how business travelers feel about the menu variety, food, and service in its restaurants.

c. A casual restaurant is considering locating a new outlet in a fast-growing suburb.

d. A fast-food restaurant wants to test the effect of two new advertising themes for its roast beef sandwich sales in two cities.

e. The director of tourism for your state wants to know how to use his or her promotion dollars effectively.