Write a question about the following article.

We went to the Air Show in OshKosh at the end of July . The boys absolutely loved it since they are obsessed with planes , jets , etc . They got to tour the inside of a B-17 Flying Fortress and an Osprey . They tried working on the underside of the F-15 Eagle and it was probably a good thing they could n't really reach anything .

Question:
Why did they go to the airshow ?
pick from the following.
a). Their boys wanted to go to one .
b). None of the above choices .
c). Their boys wanted to fly an airplane .
d). They were pilots in the airshow .