True.

With the number ofcountries that have languages which don't use the Roman alphabet (for example Greece, Russia, India, China, Japan,...) or use an extended Roman alphabet with some characters that have no ASCII representation (for example Ireland, Wales, France, Norway...) it's clear that not as many systems use ASCII as the questioner appears to think (even this website uses UTF-8, not ASCII) and quite possible that more sysems use Unicode than use ASCII.

But it would be hard to choose the wrong answer given the options provided.