In analyzing electric circuits containing a battery and at least one resistor, what is the change in potential across a resistor as one moves through it in the direction
A. It is up to the person doing a given problem to decide the direction.
B. it is in the direction of the force on a charged particle.
C. It is in the direction that the atoms move.
D. It is in the direction that negatively-charged particles would move.
E. It is in the direction that positively-charged particles would move.