Which of the Following Is True About the Method Employers

Which of the following is true about the method employers use to reduce an organizer's solicitation opportunities?

A) Employers cannot restrict computer and e-mail system use to working time only.
B) Employers cannot block employees' incoming e-mails.
C) Employers can force employees to leave working areas and plants at the end of their shifts.
D) Employers can allow organizers to solicit on quasi-public property,such as shopping mall courts or parking lots.