[单选题]
Estimate the speed of an sx go rbi8i,ggl.j +,*alpha particle that h o0q-yrzq s2x8as accelerated from rest in a uniform electric field E=5yq szr02q8- ox0 $^{−1}$ over a distance of 2.0m.
A. $0.5\times10^4\,ms^{−1}$
B. $5.0\times10^4\,ms^{−1}$
C. $0.5\times10^5\,ms^{−1}$
D. $0.5\times10^9\,ms^{−1}$
