A circular coil of radius 4 cm and of 20 turns carries a current of 3 A. It is placed in a magnetic field of 0.5 T. The magnetic dipole moment of the coil is _____.
A) 0.24 A·m²
B) 0.48 A·m²
C) 0.96 A·m²
D) 1.92 A·m²