A neutral metal bar moves at a constant velocity $$v$$ to the right through a region of uniform magnetic field directed out of the page, as shown. Therefore,

A

positive charges accumulate to the left side and negative charges to the right side of the rod.

B

negative charges accumulate to the left side and positive charges to the right side of the rod.

C

positive charges accumulate to the top end and negative charges to the bottom end of the rod.

D

negative charges accumulate to the top end and positive charges to the bottom end of the rod.