Why would an actor not have a copy of the play...

Isn't it also true that "limited resources" in answer choice E isn't specific enough?

For D, the possibility that more professionals than amateurs won prizes is not precluded, I thought. Because what if there were ten categories open to amateurs and five open to professionals, but fifty professionals were given prizes and only ten amateurs were given prizes. It doesn't say in the stimulus that only one prize was given per category, after all.

How do we know that those moral beliefs belong to "the people governed by those laws," though?

I don't think that "borrow" is so literal a term as to always signify that something is being adopted in the same epoch / cultural moment that it was first used / created. You can certainly borrow from authors of the past, as a modern writer, can you not?