the speed of a car travelling along a straight road decreases uniformly from 12.0 ms^-1 to 8.0 ms^-1 over 88.0 m. Calculate the acceleration of the car and the time of the car traveling over 88.0m

Full change in the electric plus system

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

Ok what do you need with