Question: Given the listed permissions on data.txt is it possible that user2 could have read, write, and execute permissions on data.txt?

1. No, it's clear that user2 does not have read, write, and execute permissions.
2. Yes, the `+` at the end of the 10-digit permission string signifies there's an access control list. This could possibly give user2 permissions not visible by `ls -l`.
3. It's possible that SELinux provides read, write, and execute permissions for user2 which are not visible with `ls -l`.
4. Yes, the `+` at the end of the 10-digit permission string signifies there's an extended attribute set. This could give user2 permissions to read, write, and execute data.txt.

Answer: The correct answer of the above question is Option B:Yes, the `+` at the end of the 10-digit permission string signifies there's an access control list. This could possibly give user2 permissions not visible by `ls -l`.