A loop of wire is situated inside a large solenoid, with the plane of the loop initially perpendicular to the axis of the solenoid. Current can be made to flow through the loop of wire if:
a. the current flowing through the solenoid is decreasing with time
b. the loop of wire is rotating within the solenoid and a constant current is flowing through the solenoid wire
c. a constant current is flowing through the solenoid wire
d. all of the above are true
e. only two of the above are true