Newton’s first law of motion states that an object in motion stays in motion unless acted upon by an unbalanced force. Identify and describe the unbalanced force that eventually slows and stops most motion on our planet?

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

B) erini just took the test and it is correct