Which of the Following Statements Explains Why Marketers Have Recently

Which of the following statements explains why marketers have recently increased their use of sampling?

A) Major companies have entered the sampling business and created more competition,which has helped to keep sampling costs down.
B) New technologies and creative marketing are driving new sampling methods that allow marketers to target their samples more effectively.
C) The simplification of sales promotion programs by companies such as Procter & Gamble is prompting these marketers to move away from coupons and price promotions in favor of samples.
D) Marketers believe sampling meets the complementary goals of introducing consumers to their products and getting retailers to support their programs.
E) All of the above statements explain why marketers have recently increased their use of sampling.