The two directions are in the same direction, add them
To get the result
true
false

Ithink the answers is b i hope it my friend message me if i’m wrong and i’ll change my answer and fix it for you

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n

This is the answer: body 1 + engine 2

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