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A proton is moving at $6000\text{ m/s}$ toward the east. When it reaches point P it encounters the magnetic fields of two magnets (A and B). The magnetic field due to magnet A is $0.004\text{ T}$ toward the west. The magnetic field of magnet B is $0.007\text{ T}$ to the south.

Which of the following indicates the direction of the magnetic force on the proton at point P due to both magnet A and magnet B?

A

There is no magnetic force on the proton.

B

$34.8^\circ$ south of east.

C

Down (toward the Earth).

D

South, because Magnet A exerts no force of the proton.

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