Hi,
KISS huh?
Question depends on the type of questions theyare answering although any solution requires saving the answers they've entered in some way. If its multi choice or short answer you could save each answer to a database under the user ID and then retrieve them when they log back. Or, if you're keen you could save the answers as XML files but the database solution is easier.
Setting up passwords isn't someting that can be explained in enough detail here. I suggest finding an article online and reading it.
By blocking copying I assume you mean disable printing and print screen and the like. To be honest I've never had to try it and I'm not sure a foolproof method exists. Maybe someone else has advice on that part of it.
Hope that helps,
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