Sugar dissolves readily in water because it is a(n) substance

       The answer that fits the blank space is hydrophilic.

Explanation:

       A hydrophilic substance is basically a substance with a very high polarity. If something has a high polarity, it's needed to know where is this polarity, because remember, a polar substance can have non polar and polar bonds, it depends on lots of factors. After stablishing that, we can check the hydrogen bonds, with that, we can confirm that this substance (sugar) will easily dissolve in water.

It is an hydrophilic substanceSubstances that have charge or polarity are hydrophilic, and are likely to dissolve because they have either full or partial charge areas to form hydrogen bonds with water molecules.

C. There is only one theory being tested by the experiment