20) marie is constructing a circuit board and observes that her current increases as she adds resistors. what statement explains why the current increases? a) she is constructing a series circuit board so adding resistors draws more current. b) she is constructing a parallel circuit and adding resistors increases the voltage. c) she is constructing a series circuit so increasing the resistance also increases voltage and current. d) she is constructing a parallel circuit board and the added resistors create more paths for the current, decreasing total resistance.