A car starts from rest with an acceleration of 5.0 m/s² and travels a distance of 1.0km. What is the speed valeu of this car?

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

Two cars collide, lock bumpers and move together after the collision.this collision is known as perfectly inelastic collision.

C. the electric current passes from the slip rings, through the brushes, and to the collection device.