People Have Been Concerned About Media Effects on Behavior Since

People have been concerned about media effects on behavior since the:

A) 1940s,when people feared the influence of radio on politics
B) 1950s & 1960s,with the explosive growth of TV
C) 1970s & 1980s,with the Surgeon General's report linking exposure to TV violence with antisocial behavior
D) the mid-1990s,with the introduction of the V-chip
E) the late 1990s,in the wake of the Columbine High School shootings