What is the single most important factor that you have learned about Marketing? If it's not a single thing, then discuss what this knowledge can do for you in the business world. Identify reasons that support the logic of market segmentation. Identify the major social classes in the United States. What educational level or background would a marketer expect to encounter in each social class? List two advantages and two disadvantages of secondary data. What type of involvement in foreign markets carries the highest risk? Why? Much has recently been made about the use of databases in marketing products. What is the accepted definition of a database?