When Light Bulbs Were First Introduced,manufacturers Offered One Size for All

Multiple Choice

When light bulbs were first introduced,manufacturers offered one size for all light fixtures.Today you can buy light bulbs in different shapes,different wattages,and different colors.They also differ as to how much electricity they use and their duration.Light bulb manufacturers:

A) miss sales by not concentrating on the average customer
B) recognize that different customer groups have different needs and wants
C) are sales-oriented companies
D) are companies that would state that they are in the business of selling bulbs
E) are aiming at a goal of profit through maximum sales volume