Over the course of the novel, one of the main story lines is the way that Jonas changes. He goes from being someone who completely accepts the way his society is to someone who is totally willing to (essentially) destroy it.
At the beginning of the book, Jonas has no problems with his society. He has no problems obeying the rules. His only worry is whether he will be assigned a good job.
By the end of the novel, he is thinking for himself. He has decided that the Sameness he grew up with is completely unacceptable. He is willing to go Elsewhere and release all his "memories" back into the community even though this will surely destroy it.
Answer: I believe the answer is D. To demonstrate that soldiers and workers were equally important.
Explanation: below the text reads 'laborer and combatter' which would be referring to the soldier and worker. Both of them are shown with equal stances and are shaking hands.