The stupendous power of the Tevatron made possible the 1995 discovery of the top quark - the last of six flavors of quarks predicted by the standard model theory of particle physics.

Choose your answer: based on the paragraph above can we conclude that "Particle physics is a field that is hard to understand "?

Options are:
[I] Yes;
[II] It's impossible to say;
[III] No;
I think the answer is