Question: How can you improve this code snippet?

1. The code snippet cannot be improved, this is a valid way of checking for the existence of a file.
2. Use Bash's built-in `[[ ]]` test conditions instead of the ls command.
3. The redirect to `/dev/null` will silence the return code invalidating the conditional. Removing the redirect will solve this.
4. The ls command will output the name of the file to the screen. Running ls in quiet mode will improve the code snippet.

Answer: The correct answer of the above question is Option B:Use Bash's built-in `[[ ]]` test conditions instead of the ls command.