Anet force of 100 newtons is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of

B) raising the temperature and reducing the volume of the gas.|-/ 

Answerwavelength;

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

The fertilized egg  begins to develop into a hollow ball of cells called the blastocyst.