In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: a solution is formed by one substance being dissolved in another substance, Fact2: Most substances can exist as a solid, liquid or gas., Question: a solution is formed when one of these gets dissolved into another one of these (A) Calcium carbonate (B) Condensation (C) near the shoreline (D) solid, liquid, gas (E) a hydraulic system (F) evaporation (G) Light passing through water (H) chemical changes
D