All of the typical synonyms I can think of refer both to the act of making a decision and what you came to as your conclusion.
- Decision (I made a decision, and it resulted in my decision)
- A choice (I made a choice, and what I picked was my choice)
- A selection (My selection resulted in a selection)
Is this an inherent flaw in English that the noun to describe a question with options is also a valid noun for the answer you pick? If not, can anyone find a synonym which works in this context?