The Polarization of Light Passing Though the Dust Grains Shows

Multiple Choice

The polarization of light passing though the dust grains shows that:

A) the dust grains are elongated in shape.
B) the dust grains are aligned by a weak interstellar magnetic field.
C) the dust grains are chiefly made of iron.
D) Both A and B are correct.
E) All of the above are correct.