Final answer:
The correct sentence should use 'is' instead of 'are' to match the singular subject 'company,' resulting in the sentence: 'Our company is always aiming to improve...'.
Step-by-step explanation:
The correction that should be made to the sentence "Our company are always aiming to improve, therefore, we appreciate any feedback that you are able to give us." is option C: Change "are" to "is". This is because the subject of the sentence, "company," is singular and requires a singular verb for correct subject-verb agreement. Hence, the corrected sentence should read, "Our company is always aiming to improve, therefore, we appreciate any feedback that you are able to give us."