Which of the following statements is most correct about the uncertainty principle?

A. It is impossible to know exactly both the position and the momentum of a particle simultaneously.
B. An electron with some momentum can be trapped into an arbitrarily small box.
C. Our instruments will eventually be able to measure more precisely than the principle presently allows.
D. On large length scales, the uncertainty principle dominates our understanding of the physical world.
E. A particle limited in space can occupy any energy.

A.
The founding parameters of the uncertainty principle are the position and momentum of a particle proportional to a constant by an inequality. This means that if the value for the position of a particle gets more precise, the value for the momentum gets more imprecise, and vice versa.

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