A Circular Loop of Radius 0

A circular loop of radius 0.10 m is rotating in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are perpendicular.

A) zero
B) 3.1 × 10^-3 T∙m²
C) 5.5 × 10^-3 T∙m²
D) 6.3 × 10^-3 T∙m²
E) 9.2 × 10^-3 T∙m²