Assume that the farmer and the rancher each has 40 labor hours available. If each person divides his time equally between the production of meat and potatoes, then total production is a. 7.5 pounds of meat and 6 pounds of potatoes. b. 10 pounds of meat and 8 pounds of potatoes. c. 6 pounds of meat and 7.5 pounds of potatoes. d. 5 pounds of meat and 4 pounds of potatoes.

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