These are OK A. I hope that answers your question. B.
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AnonymousI hope i have clarified your concern,This would be much more polite way.No, it wouldn't. All of the original sentences are polite enough. Your version is no more polite, and it is less natural.
AnonymousI hope I have clarified your concern. This would be much more polite way.The problem is that if you clarify someone's concern, you just make it more clear what they are concerned (or worried) about. That has nothing to do with answering their question.