In The 1950s And 1960s, What Drastically Changed Political Campaigns In The 1950s And 1960s, What Drastically Changed Political Campaigns?

In the 1950s and 1960s, what drastically changed political campaigns? - in the 1950s and 1960s, what drastically changed political campaigns

A) The power of political parties.
B) times.
C) to reform the financing of election campaigns.
D) Television.
E) The "baby boomers".