The interesting question is what will happen if the Twins decide not to exercise the option. Silva does not have enough service time to be eligible for free agency, so the Twins would still control his rights. Silva does have enough service-time to be eligible for arbitration, however. This means the Twins would have to decide whether to keep Silva, and risk having him make more money than they were willing to pay through arbitration, or non-tendering him, making him a free agent.
We'll find out in less than 48 hours what the verdict is. Should be interesting.