It is definitely not B nor D because those two have negative meanings. It can't be C because excessive means "beyond the usual", which has a slightly negative meaning.
The answer should be A, conversational.
The answer is tempered steel:)
Answer: directly after the reason and as support for the rebuttal
Explanation: You need to back up your reasons with the evidence to support your claim, and you need to back up your rebuttal as well with evidence.
Answer:
well it depends .,.
Explanation:
what is the argument about?