Question

The tendency to embrace a plurality of styles by the 1980s, in contradiction to the idea of "branding" and maintaining a uniform or standardized corporate identity, is illustrated by

Answer 1

I believe the answer is: the MTV (Music Television) logo
due to this branding, MTV able to held the highest viewership for viewers in 15-28 years old age group at that period.
The popularity of MTV started to diminished after the development of online media such as youtube.