 Would the narrator consider his trip worthwhile?
Stuff like this: Want to visit Earth—see the Galaxy's most glittering and exclusive world? It's the best of its kind, the only really decent place where Earthmen can get a gander at the other species of the universe. I passed him along to Auchinleck to sign at anything short of top rate. Before then, anyone could visit Earth. Every alien wants to see Earth once in his lifetime, and there's only one way he can do it. And now, please, there are many applicants waiting—" You'd think it would be sort of humiliating to become a specimen in a zoo, but most of these races take it as an honor.
 All of the above
 No - it was more trouble than it was worth  All of the above  No - it nearly cost him his life  Yes - he found many new non-terrestrials