A particle with electric charge is fired into a region of space where the electric field is zero. It moves in a straight line. Can you conclude that the magnetic field in that region is zero?( )
选项：

A:No; an observation of an object with electric charge gives no information about a magnetic field.
B:Yes, you can.
C:No; the field might be parallel to the particle’s velocity.
D:No; the field might be perpendicular to the particle’s velocity.
E:No; the particle might need to have charge of the opposite sign to have a force exerted on it.