BONUS: At the heart of the Chuck Rosenthal email scandal liesHah! it's a trick question ... all are correct. Via Houston's Clear Thinkers.
D. Insularity and in-breeding
UPDATE: A commenter perhaps correctly suggests that "the question needs to be thrown out. The heart of the matter is the wrongful arrest lawsuit against the Harris County Sheriff." True enough. I neglected earlier to link to this Houston Chronicle story describing the background on the lawsuit that caused the recent email kerfuffle over at the Harris DA.