Which of the following is correct regarding public-sector collective bargaining in recent years?

1. It has been the target of legislative limitations disfavoring public-sector collective bargaining.
2. It has been the target of administrative agency limitations disfavoring public-sector collective bargaining.
3. It has been the beneficiary of legislative expansions of public-sector collective bargaining.
4. It has been the beneficiary of administrative agency expansions of public-sector collective bargaining.