[单选题]
The reason the position of a particle cannot be specified wita+mtlcpiplg w -nzj r*4)i69b)3qw1vh infu5mw o*j:h-+ brf j)ndinite precision idr - )uj fnm:w*5jbo+hs the
A. exclusion principle.
B. uncertainty principle.
C. photoelectric effect.
D. principle of relativity.
