Answer:
The correct answer is: television.
Step-by-step explanation:
The "Cola Wars" refers to the increasing competition between worldwide known soft drinks Coca-Cola and PepsiCo during the 50s and 60s. Those decades were characterized by rapid changes in the world and the soda business was not left behind. In those years, a powerful source for marketing was introduced: the television. This boosted propaganda for the drinks of the two companies.