The word which best completes the sentence is "attention," which means the sentence would be "We appreciate your attention to this matter."
Why is "attention" the best word?
- "Assistance" does not go with the preposition "to". It should be followed by either "on" or "in".
- The same goes for "understanding" and "cooperation." They should be followed by "in" rather than "to".
- The only word that goes with the preposition "to" is "attention," which makes it the best option.
With the information above in mind, we can select "attention" as the word that best completes the sentence.
Learn more about completing sentences here:
https://brainly.com/question/9494223
