"Starquakes" Are the Rearrangement of Material in a Neutron Star

"Starquakes" are the rearrangement of material in a neutron star, similar to an earthquake on Earth. Which one of these statements about starquakes is correct?

A) Starquakes are triggered by instabilities in the neutron star's magnetic field.
B) Starquakes are caused by stresses in the crusts of neutron stars that form close binary systems and exert tremendous forces on each other.
C) Starquakes cause glitches in the pulsar period.
D) Starquakes cause rents in the crust of a neutron star and allow gamma rays and X-rays to escape from the interior, like the coronal holes in the Sun's atmosphere.