If M = M_B (In a Paramagnetic Material)for an External $\times$

Multiple Choice

If m = m_B (in a paramagnetic material) for an external magnetic field of 20 kG,what fraction of the saturation magnetization is M at 400 K?

A) 5.60 $\times$ 10^-4
B) 2.24 $\times$ 10^-3
C) 1.12 $\times$ 10^-3
D) 3.36 $\times$ 10^-3
E) 4.48 $\times$ 10^-1