Answer:
a) Voltage
Explanation:
As we know that voltage difference and electric field is related as
\(E = \frac{\Delta V}{\Delta x}\)
now when we apply voltage across the length of any conductor then it will induce electric field inside the conductor.
Due to this electric field we can say that the free charge inside the conductor will experience electric force on it
\(F = qE\)
Due to this electric force free charge will start moving inside the conductor and it will form electric current
So here correct answer for electric current will be
a) Voltage
