First of all, based on my experience on English Language and Usage Stack Exchange, it isn't always true that the most upvoted answer is the correct answer. If you are not sure, you don't have to accept any answer. However, it would be nicer if you could research further into your answer and pick one as an accepted answer. It entirely depends on you.
Second, a correct answer tends to attract more upvotes while an incorrect one does downvotes. You can base your decidion on the number of upvotes.
Third, it is better to wait for a couple of days before accepting any answer. The community members are likely to comment if there is something wrong or unclear with an answer.
Once you submit your question or answer, it belongs to Korean Stack Exchange and it is no longer your property. That's why we need to make every effort to post well-researched and definitive questions and answers.