Which of the following statements is true of persuasive messages?

a. an effective message will reach all audiences, regardless of background.

b. messages presenting a one - sided argument tend to be more effective than “he said; she said” messages.

c. messages that offer a remedy for a person’s fears tend to be effective.

d. people tune out repetitious messages, so they quickly lose effectiveness.

The relationship of both of them

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