Final answer:
Nolan Bushnell's entrepreneurial idea that started the video game revolution was starting the first video game company Atari.
Step-by-step explanation:
The entrepreneurial idea that started off the video game revolution was d. Starting the first video game company. Nolan Bushnell, along with his friend Ted Dabney, founded Atari in 1972 and launched Pong, the first commercially successful video game. Atari went on to become a leading company in the video game industry, revolutionizing the way people interacted with technology and paving the way for future advancements in gaming.