Which is a true statement?​ Select one:
a. ​Over half of U.S. adults over the age of 65 were Internet users.
b. ​Social media is only for certain companies and industries.
c. ​B2B firms cannot benefit from social media.
d. ​Monitoring social media is an inefficient use of company time.
e. ​Most people do not spend that much time using social media.