A useful option with a clear limit

An original Spanish practice sentence reads “Es una buena opción, pero no es la única solución”. A learner is asked to explain how the two parts relate. One draft says the speaker regards the option as useless; another calls it the sole acceptable solution. A third preserves both the positive evaluation and the limit on exclusivity. The exercise supplies no actual public policy, technical design or speaker biography. It tests the meaning of the complete Spanish statement rather than an independently verified recommendation. The learner should identify the contrast introduced by pero and the effect of no es and la única, without importing a personal preference. English glosses can help review the answer afterwards, but independent reading should first establish what the Spanish actually affirms and what it denies.