Correctness is key. The other ones are optimizations at most. Although I would always include humor... ;-)
Answer:
EOF stands for End Of File
Google explains it well: EOF is a condition in a computer operating system where no more data can be read from a data source. The data source is usually called a file or stream.
The answer to your question is A. A mark of social disgrace that sets tyre deviant apart from the rest of society. Hope I helped.
