Why did the six-year-old boy Bobby feel so upset on Christmas Eve? （ ）

Why did the six-year-old boy Bobby feel so upset on Christmas Eve? （ ）

A.

He had no father to take care of him. 

B.

His mother could not buy boots for him. 

C.

The family was suffering from poverty in spite of the mother's hard work. 

D.

All of the children in the family but him had Christmas gifts for their mother.

正确答案是D