A quantum particle of mass m1 is in a square well with infinitely high walls and length 3 nm. In which situation, does the particle have the highest energy?

A、Theparticleofmassmisinthegroundstateofthewell.;
B、Theparticleofmassmisinthen=2excitedstateofthewell.;
C、Aparticlewithmass2misinthegroundstateofthewell.;
D、Aparticleofmassmisinthegroundstateofawelloflength6nm.