The boy's rudeness shocked them. They put down the boy's rudeness to his parents' having spoiled him. 请选择最佳答案
A.
They were shocked by the boy's rudeness, which was put down to his having been spoilded by his parents.
B.
They were shocked by the boy's rudeness,they put down the boy's rudeness to his having been spoiled by his parents.
C.
They had been shocked by the boy's rudeness, the boy's rudeness was put down to his parents' having spoiled him.
D.
They had been shocked by the boy's rudeness, which was put down to his having been spoilded by his parents.