Answer: The answer is D it makes more sense.
Explanation: :)
It would be the first one-A. Because it shows that you are being polite and kind ect.
:)
Answer:
C. In a concluding manner
Explanation:
Conclusive is an adjective. It´s portraying an adjective in the sentence, not a verb even though concluding is a verb. Hope this helps. Always pay attention to the part of speech.