Which of the following statements about current are true? (i) In metal wires, it is the negative charges (Le, the electrons) that move in response to an applied voltage. (ii) By historic convention, circuit diagrams are drawn showing the direction of a "conventional current' as if it were positive charges that move (even though they do not).(iii) The "conventional current" runs in the opposite direction to the actual motion of the electrons. a. Only statement (ii) is true. b.Only statements (i) and (lil) are true. c.Only statement (i) is true. d.All three statements are true.