Concept:This is a second conditional sentence, used for unreal or imaginary situations.
Explanation:In a second conditional, the main clause uses “would,” and the if-clause uses the simple past tense.
Here, “would be hungry” is in the main clause.
So the if-clause must contain a past tense verb.
Among the options, only “refused” is in the simple past tense.
Therefore, the correct choice is C.
Answer:C. refused