Electricity may be generated by rotating a loop of wire between the poles of a magnet. The induced current is

Electricity may be generated by rotating a loop of wire between the poles of a magnet. The induced current is greatest when:

A. the plane of the loop is parallel to the magnetic field
B. the plane of the loop is perpendicular to the magnetic field
C. the magnetic flux through the loop is a maximum
D. the plane of the loop makes an angle of 45 degrees with the magnetic field.

I dont understand?

The emf (and induced current) is caused by the changing area linking with the (steady) field - the rate of change of flux-linking area is greatest as the coil is parallel with the field ... the flux linking with the loop is greatest when perp. to field but it's rate of change in this position is zero -►Ans. A