An electron is moving through space at a speed close to the speed of light. At one instant in time, its momentum is kg m/s. It experiences an electric force of N. After a time of 3 ns ( s), what is the new momentum of the electron?
A.
kg m/s
B.
kg m/s
C.
kg m/s
D.
kg m/s
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【单选题】Of all the museum's paintings, only one ____ the fire.