Which statement about opinion polls is most accurate?

opinion polls have been around longer than social media ( A )

Explanation:

Opinion poll is a human research survey of public opinion about an activity or project to be engaged in. this is usually carried out on a sample of the kind of individuals whose opinion is needed to successfully carry out the project or activity.

opinion poll have been around long before the birth of social media. it is as old as man because it was even practiced in the stone ages. in the 21st century opinion polls are carried through emails, google and other forms which also includes social media of recent.  

c. troops marched forward in close formation against newer, more accurate weapons