Which statement is true regarding dc current?
a. the electrons move back and forth.
b. there can only be one voltage supplied.
c. a high voltage current can be transformed into a low voltage current.
d. a low voltage current can be transformed into a high voltage current.
e. this is what is sent from the power plants to your home.

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current

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