The other day, I posted a question as a guest at the site of Stack Exchange. Some users answered for me, and I wrote "Thank you". But I forgot to decide the best answer at that time.
Now, I reinstalled Windows OS on my personal computer. And when I tried to check the best answer, I noticed I can't check the best answer. I can't become the guest as before (probably because the browser cookies disappeared when I reinstalled the OS. The browser is Internet Explorer.)
Whatever way, I want to check the best answer. What should I do?