Excuse me, which sheep died

Of course, Sheep A is dead. Don't be misled by the question. This is a brain teaser.

Specific analysis: Some people will think that sheep B is dead, because B was taken away and the wolf scared the rest of the sheep away. Actually, it's not over, because the title implies that four sheep were grazing in qingqing grasslands, but the second sheep was taken away, so the first one must have been eaten to death. The latter said that Sheep A had been scared before.