The nardo ring is a circular test track for cars. it has a circumference of 12.5km. cars travel around the track at a constant speed of 100km/h. a car starts at the easternmost point of the ring and drives for 15 minutes at this speed.
what distance, in km, does the car travel?
what is the magnitude of the car's displacement, in km, from its initial position?
what is the speed of the car in m/s?

You will hear a hissing sound because of the carbon dioxide escaping the can or bottle

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