Which of the Following Helps Explain Why Marketers Have Shifted

Which of the following helps explain why marketers have shifted more of their budgets to sales promotion in recent years?

A) increased media clutter and ads that target all the same consumers
B) fewer brands on the market and a greater need to attract consumers' attention
C) more long-term perspective on marketing and longer wait for results
D) more powerful suppliers and more ways to control retail stores