The marketing concept era occurred from __________. Marketing The marketing concept era occurred from __________. a. the early years of the U.S. to the 1920s b. the 1920s to the 1960s c. the late 1950s to the late 1990s d. the mid-1960s to the present e. the mid-1980s to the present Answer: C Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+