Final answer:
The greatest number of voter applications from 2014 to 2018 came from departments of motor vehicles and county or government registration offices, as per the US Census data.
Step-by-step explanation:
According to US Census data from the period between 2014 and 2018, the largest source of voter applications was through departments of motor vehicles (DMVs) and county or government registration offices. These methods of voter registration service a significant portion of the American voting-age population
enabling citizens to register while handling other routine tasks, such as renewing a driver's license. Despite efforts to increase voter turnout and ease voter registration processes, barriers such as inadequate resources, clerical errors, and insufficient notification of application issues still exist.
Furthermore, historical context shows that voter registration has been shaped by legislation and social movements, such as the civil rights actions taken to register black voters in the 1960s.