Although Historians Often Disagree About How and When the Concept

Although historians often disagree about how and when the concept of public relations got started from a world-wide perspective, they agree that in the United States, the application of public relations principles began during what era?

A) with the landing of English colonists at Plymouth Rock in the 1600s
B) with the Revolutionary War era of the late 1700s
C) with the Civil War and Reconstruction era of the late 1800s
D) with the Prohibition era of the early 1900s
E) with the Clinton era of the late 1900s