What sentence???
Since there's nothing, i can't answer it. Sorry!
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“The Green Knight's original challenge was for someone to step forward and strike him with his own axe under the condition that he meet him again one year later to receive a blow in return. Arthur steps up to the challenge, but in order to protect him, Sir Gawain steps up and meets the challenge instead”.
Hope this helps:)
Because the seating shows the time and place and you can see where the character lives and the time that is the story taking place
I believe it would be a, as the passage focuses on how they became more americanized