Marketing units may be organized according to functions, products, regions, or types of customers. Describe how you would organize the marketing units for the following:
a. Toothpaste with whitener; toothpaste with extra strong nicotine cleaners; toothpaste with bubblegum flavor
b. A national line offering all types of winter and summer sports clothing for men and women
c. A life insurance company that provides life, health, and disability insurance.