[单选题]
A parallel-plate capacito3gfo47 xo u-grr has a plate s)b8*jvih f :yfeparation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between j 8hfby:f)v*i the plates?
A. 100 N/C upward
B. 100 N/C downward
C. 40000 N/C upward
D. 40000 N/C downward