Which Is a Prime Example of the Unpredictability and Indeterminacy

Which is a prime example of the unpredictability and indeterminacy inherent in games?

A) The character goes into the house and opens the door every five minutes
B) The character goes into the house at different times
C) Characters always go into the house at the same time
D) The character goes into the house and opens the door at exactly 10 minutes into the game