The correct answer is D) word usage.
The uniqueness of Laura’s speech in this excerpt is revealed by her word usage.
We are talking about the story "Daughters of Invention," written by Julia Álvarez, a Dominican Republic novelist, based in the United States. In the mentioned story, Álvarez refers to the life of her family as immigrants in the United States, and the difficulties they lived to understand and assimilate a different culture and combine it with their own culture and traditions.
Julia Alvarez is a famous Latino writer who had written other successful books such as "In the Time of the Butterflies," and "Yo!"