For a local government to outlaw all strikes by its workers is a costly mistake, because all its labor disputes must then be settled by binding arbitration, without any negotiated public-sector labor settlements guiding the arbitrators. Strikes should be outlawed only for categories of public-sector workers for whose services no acceptable substitute exists.
The statements above best support which of the following conclusions

A．Where public-service workers are permitted to strike, contract negotiations with those workers are typically settled without a strike.

B．Where strikes by all categories of pubic-sector workers are outlawed, no acceptable substitutes for the services provided by any of those workers are available.

C．Binding arbitration tends to be more advantageous for public-service workers where it is the only available means of settling labor disputes with such workers.

D．Most categories of public-sector workers have no counterparts in the private sector.

E．(E) A strike by workers in a local government is unlikely to be settled without help from and arbitrator.