Understanding Cause and Effect Explain why scholar-officials might have felt more loyalty to Wu than did
members of the military aristocracy.

It mean  additional, or one more, or sometimes one less. it's a matter of the increment, a little more or a little less, that's what the  margin  refers .

The correct answer is "black sabbath - accusations".a well known english rock band in the past, the black sabbath was created in birmingham in 1968, by the guitarist and the main songwriter tony iommi, the bassist and the main lyricist geezer butler, drummer bill ward and lead singer ozzy osbourne.