A long straight wire is stretched along the north–south line and is free to move horizontally. A uniform magnetic field of 0.5T is applied vertically upward. When a current of 4A flows from south to north, the wire moves towards the east. If both the current and the magnetic field are simultaneously reversed, in which direction will the wire now move?
a) Towards west
b) It will not move
c) Towards east
d) Towards north