Final answer:
The correct Supreme Court case is Lechmere, Inc. v. NLRB (1992), which held that unions cannot solicit support on private property unless no reasonable alternatives exist.
Step-by-step explanation:
The Supreme Court case that imposed restrictions on unions from soliciting support on private property unless no other reasonable alternatives exist is Lechmere, Inc. v. National Labor Relations Board (1992).
In this case, the Supreme Court ruled that nonemployee union organizers do not have the right to solicit union support on an employer's property, except in the rare instance where no reasonable alternatives for communication with the employees exist. This decision was significant because it limited the ability of unions to access workers on private property, thereby affecting the way unions could campaign and organize.
Even though cases like Ledbetter v. Goodyear Tire & Rubber Co. (2007) and others like Roe v. Wade (1973) and Brown v. Board of Education (1954) are landmark Supreme Court decisions, they address different legal issues unrelated to union activities on private property. Ledbetter, for example, dealt with employment discrimination specifically in the form of compensation, while Roe v. Wade tackled the issue of a woman's right to an abortion