To Control Complexity Among a Collection of Triggers,which Guideline(s)should Be

Multiple Choice

To control complexity among a collection of triggers,which guideline(s) should be followed?

A) Use data manipulation statements primarily in BEFORE triggers.
B) For triggers that fire on UPDATE statements, do not list the columns to which the trigger applies.
C) Be cautious about creating triggers on tables affected by actions on referenced rows.
D) All of the above.