When Tomohiro Nishikado invented Space Invaders® in 1978, the microcomputers available in Japan could not handle its initial complexity which led Nishikado to import a CPU from the United States that was integrated into a microprocessor. This is a classic example of what?

A. innovating to overcome a technical challenge


B. the need to import items for any technology to really work


C. how the U.S. is better with technology than Japan


D. quitting when technical challenges arise