Read the passage.Emergency!Prior to 1968, the United States did not have a nationwide phone number for emergency assistance; instead, emergency numbers varied from region to region. When people required urgent help from the police or the fire department, they had to either call the operator or dial their local services directly. Concerned about the dangerous inefficiency of this system, the federal government decided to establish a single emergency number that could be used throughout the country. The telecom company AT&T proposed that the code be 911, a sequence that was easily remembered and not already in use as an area code or service code. This proposal was accepted, and the first 911 call was made by Alabama Senator Rankin Fite on February 16, 1968.What is the main, or central, idea of the passage?The code 911 was chosen as the universal emergency number because it was easy to remember and was not already in use.To replace an inefficient emergency call system, the U.S. government instituted nationwide 911 service.In the past, Americans requiring emergency assistance had to call either the operator or their local emergency service.Submit