用补码表示的两个整数相加时，判断溢出的规则是

A．若结果的符号位是0，则一定溢出

B．若结果的符号位是1，则一定溢出

C．两个符号位相同的数相加，若结果的符号与加数的符号位相反，则一定溢出

D．若结果的符号位有进位，则一定溢出

Tom put his heart into the wildlife research, and finally, his efforts________him great success and fame.[ ]

A. saved  

B. earned

C. made  

D. offered