What plot device does Alvarez use in this opening excerpt from "Antojos," when she puts the reader directly into the action of the story?

For the first time since Yolanda had reached the hills, there was a shoulder on the left side of the narrow road. She pulled the car over out of a sense of homecoming: Every other visit she had stayed with her family in the capital,
O a
in medias res
O b
foreshadowing
O c chronological order
O g flashback

O a in medias res

Alvarez uses the in medias res plot device by starting the story in the midst of the action, with the character Yolanda already on the road and driving. This technique helps to immediately engage the reader and create a sense of intrigue, as they are thrown into the middle of the story without any background information.