How do enterprise social networking tools create business value?

A$.$ By monitoring employees and prospective employees' social media presence

B$.$ By limiting the amount of time employees can use social media while at work

C$.$ By monitoring vendors and competitors' social media presence

D$.$ By connecting the customers of an organization through profiles, updates, and notifications on Facebook and Instagram

E$.$ By connecting the members of an organization through profiles, updates, and notifications, similar to Facebook features, but tailored to internal corporate uses