Under What Conditions Must an Employer Allow Nonemployee Union Solicitation

Under what conditions must an employer allow nonemployee union solicitation on company property?

A) if there is currently no union representing the company's employees
B) if the union is affiliated with another union that currently represents other employees of the company
C) if the employees live in a company town such that it would be difficult to solicit the employees off company property
D) if the purpose is to solicit employees to change union representation rather than to solicit nonunion workers to join a union
E) if the purpose of the union is to address issues other than wages