A、Jack is sure to quit his job. B、Jack is a changeable person. C、Jack will not change his job. D、Jack likes telling jokes. C因果关系

M：It seems that each time I come to this restaurant the price of the dishes get increased．
W：Yes，but what annoys me more is that the quality of the service doesn’t keep pace．
Q: What did the woman probably mean by her remark?

M：Jack must have been joking with me．He told me that he was trying to quit his present job for another one．
W：Don’t be too sure．He just won the big prize from the company．
Q：What can be inferred from the woman’s words?