Two Small Masses, M_A = 4

Two small masses, m_A = 4.0  10^-3 kg and m_B = 2.0  10^-3 kg, are connected by a 1.0-m rod of negligible mass. The angular acceleration about B produced by a force of 0.016 N applied at A is approximately

A) 4.0 rad/s².
B) 2.7 rad/s².
C) 11 rad/s².
D) 12 rad/s².
E) 4.0  10² rad/s².