Which communication tool would allow a current presidential candidate to most effectively interact with the greatest number of citizens? An appearance...

Which communication tool would allow a current presidential candidate to most effectively interact with the greatest number of citizens?

[removed]An appearance arranged to meet and greet voters at a local fishing tournament

[removed]A political advertisement appearing in newspapers across the country

[removed]A frequently updated social media site with a question and answer forum

[removed] An automated generic text message sent to cell phone numbers of registered voters