Which of the Following Statements Accurately Describes the Status of Unions

Which of the following statements accurately describes the status of unions in Mexico?

A) Mexican firms are used to negotiating with one unified union from factory to factory
B) A variety of federal laws govern labor relations in Mexico, many of which favor management, including caps on wages
C) Unions have won a large number of worker rights, mostly through federal legislation rather than direct union activity
D) Mexico is a country with a relatively low degree of union participation