Synonym

Choose the one that is closest meaning to the underlined words.

The origin of the leisure society is the dream of living like a master, with the work done by robots, mechanical slaves. The sting in the tail of this story of slaves, however, is that once freed, people often become robots themselves, at least in part of their lives.

(A) The unpleasant pain

(B) The unexpected twist

(C) The inevitable conclusion

(D) The most important lesson

Is (A) the right answer? Thanks.