According to the law of conservation of energy, which changes would increase the total energy of a system? A. An addition of 300 J of GPE and a loss of 450 J of thermal energy

B. An addition of 200 J of thermal energy and a loss of 550 J of thermal energy

C. An addition of 400 J of thermal energy and a loss of 550 J of kinetic energy

D. An addition of 500 J of kinetic energy and a loss of 450 J of thermal energy

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

Shania is trying to determine the oldest geologic unit on this map and the reason to why is she unable to do so is that  the units are all the same age.. when there is the same age, there will be no oldest geologic unit and that i cannot be credible.