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The preposition "at" is the most appropriate to be used in this sentence, as shown in option C.

What does the word "at" represent in the sentence?

  • It's a preposition.
  • It serves to link the terms of the sentence.
  • It's a bridge between words.
  • It promotes the cohesion and fluidity of the text.

Prepositions are very important for a sentence or text to be meaningful. There are many different prepositions and knowing how to use them correctly is essential for a good writer.

The preposition "at," for example, should always be used to indicate a specific place, with the heart.

More information about prepositions is in the link:

https://brainly.com/question/17476214