A Coil Is Placed in a Magnetic Field and Has

A coil is placed in a magnetic field and has a flux F_B through it.The coil is stressed so that its area reduces to 75% of its original value.If the plane of the coil stays the same and the flux through it remains the same,how must the magnetic field change?

A) It must increase by 25%.
B) It must increase by 33%.
C) It must increase by 125%.
D) It must decrease by 25%.