There is a current of 1.344 amp in a copper wire whose area of cross-section normal to the length of the wire is `1 mm^(2)`. If the number of free electrons per `cm^(2)` is `8.4 xx 10^(22)` then the drift velocity would be

A. `1.0 mm//sec`

B. `1.0 m//sec`

C. `0.1 mm//sec`

D. `0.01 mm//sec`