Incomplete question.
Options:
Answer:
When the green rubber ball leaves the person's hand (frame 120)
Explanation:
Remember, we are told to answer based on the green rubber ball, which means we are to take note of the moment when the green rubber ball leaves the person's hand (frame 120).
However, if we decide to set the time at the start of the video or when the green rubber ball reaches the top, we would get inaccurate results.