Which of the following is true of social networking sites according to Hampton et al. (2011); Subrahmanyam et al. (2008); and Manago, Taylor, and Greenfield (2012)?
They are often used to maintain and strengthen ties to others.
They are related to reduced participation in political discussion and activities.
The number of people using such sites decreased between 2008 and 2010.
In recent years, young adults' use of such sites has reduced drastically.