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Multiple Choice

If there is a printer that is either out of service or busy, then some job has been lost.

If all printers are both out of service and busy, then all jobs have been lost.

If some job has been lost, then there is a printer that is both out of service and busy.

If there is a printer that is both out of service and busy, then some job has been lost.

A printer is both out of service and busy if some job is lost.