[单选题]
Suppose that the speed of an electron traveling 2000 m/s is known to an accur2ezw y6v8+0 l;ng lzvyv32csjac e3u/- ka fg7qd-fxb9o6oe3z sy of 1 pa-/f6s7e fd39 o qbz -axok3guert in (i.e., within 0.001%). What is the greatest possible accuracy within which we can determine the position of this electron?