[单选题]
The reason the position of a * ky44hr5u)yhm pw o2kparticle cannot be specifiphfw:1-uu2pj r6kw :s3wiv00 til.lq ed with infinite precision is : p 6u3 0w0upiiwt-vfhlj. 1lqswr k2:the
A. exclusion principle.
B. uncertainty principle.
C. photoelectric effect.
D. principle of relativity.
