|An answer without "mark" has white background and you should only see the "accept solution" button.
Once accepted the title background gets green and the question gets the "V" in the list of questions to say, it has been solved.
The red "reject solution" button should only be visible in accepted solutions just in case you change your mind later
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.