"In the circuits at right, all three bulbs are observed to be
equally bright (A=B=C). Why are the three bulbs equally bright?
(Check all that apply.)
Because the voltage across A, B, and C are all equal
Because the currents through A, B, and C are all equal
Because there is the same current from the battery in each case
Because there is twice as much current from the battery in the circuit containing bulbs B and C, and B and C share the current equally.