Well, if this is from the giver, the boy's father injects the smaller twin. That is why when the giver actually shows the boy what happened during the process, the boy is so distraught. He thought his father was a good person. After that he then realizes that his whole society is messed up and that they kill their own kind if the don't fit in with society.
O cliche would be your answer, have a great day!
The correct answer is C, historical context. There have been many literary movements throughout time, starting from the old era, to the postmodernism that is today. And usually, each literary movement was created as a reaction to the previous movement - romanticism was before realism, modernism was after realism, etc. The historical context demanded changes, and as years passed, people and their needs changed, and thus new literary movements were created. During Queen Victoria, there was Victorian era, where everyone was reserved and cared about their reputation, and that reflected in the literature. When people needed something modern, modernism emerged. When technology thrived, cyber punk literature was created. Every era demands a different approach to literature, and thus new movements are born.