A Closed Flat Loop Conductor with Radius $2.0 \mathrm {~m}$ Is Located in a Changing Uniform Magnetic Field

A closed flat loop conductor with radius $2.0 \mathrm {~m}$ is located in a changing uniform magnetic field. If the emf induced in the loop is $2.0 \mathrm {~V}$ , what is the rate at which the magnetic field strength is changing if the magnetic field is oriented perpendicular to the plane in which the loop lies?

A) $0.080 \mathrm {~T} / \mathrm { s }$
B) $2.0 \mathrm {~T} / \mathrm { s }$
C) $1.0 \mathrm {~T} / \mathrm { s }$
D) $0.16 \mathrm {~T} / \mathrm { s }$