Read the following context and choose the best option to answer the question.
Context: This week on Idaho Photo is dedicated to aircraftOntario , Oregon Air FairThis last Saturday I had a chance to get away from work and relax at the Ontario Air Fair . I had never been to one and what a lot fun it is for free ! No admission was charged , I did donate to the parking fund though .
Question: What may be a valid fact about the air fair ?
Options: 
- I had a good time there previously .
 - None of the above choices .
 - It did not require people to spend money .
 - Cars must pay a parking fee .


It did not require people to spend money .