Sobre un bloque de 40 N se aplica una fuerza de 15 N formando un ángulocon la horizontal de 25° como se muestra en la figura. Si el bloque adquiere una aceleración de 1.52, calcularel coeficiente de fricción cinético

Is there a picture to go along with this

Ibelieve that the correct answer is: c. along plate boundaries

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