Answer: C. I decided to go play rodeo on my bicycle with the purple banana seat and the sissy bars.
Step-by-step explanation:
The bicycle that Zippy describes is called a Wheelie bike and it used to be famous in the 60's and the 70's.
This therefore gives the reader a clue that the timeframe the book was set in was in the 60's or the 70's which is proven by the fact that the book was indeed set in the 60's as Zippy was born in 1965.