The "Inside Story" Focuses on Employers' Policies Regarding Employees' Use

The "Inside Story" focuses on Employers' Policies Regarding Employees' Use of Social Media.The NLRB issued guidelines to protect employees' use of social media,especially concerning:

A) concerted activity under Section 7 of the NLRA,including communication to each other about wages,hours,and working conditions.
B) concerted activity under Section 12 of the NRLA,including communication to each other about wages,hours,and working conditions.
C) unfair labor practices under Section 1 of the NRLA,including retaliation emails.
D) a public sector employee's right to freedom of speech and collective bargaining information.