Why was Ötzi's body so well-preserved?

Why was Ötzi's body so well-preserved?
A、He was buried in a tomb with special rituals
B、His body was quickly covered by avalanche snow
C、The climate where he died was extremely hot and dry
D、He was embalmed before being left to rest
【正确答案】:B
【题目解析】:His body was quickly covered by avalanche snow