The tendency of an object to resist a change in motion is called
a. displacement
c. momentum
b. inertia
d. acceleration

B. inertia

inertia is the internal property of an object which resists any physical changes to its  motion, including changes in speed and direction of an object. inertia is directly proportional to the mass of the object, such that, greater the mass, higher the inertia of the object. 

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