Q = Charge delivered by the wire = 12.0 C
t = time taken for the charge to be delivered = 4.0 s
i = current flowing in the wire due to the flow of charge = ?
Current is defined as the time rate at which charge pass through a particular point.
Current in the wire is given as
i = Q/ t
inserting the values
i = (12.0) /(4.0)
i = 3 A
hence the correct choice is 3.0 A