A subordinate clause doesn't form a complete sentence and contains a subject and verb.
So, the subordinate clause is "By the time they arrived."
The novel of manners dealt primarily with a single social class. It focuses on the way they behave, talk, and basically, live.
I wonder what's on the other side.
I wonder what would happen if i take a little peek.
The three forbidden things are:
1. It is forbidden to go East.
2.It is forbidden to go to the "Dead Places", unless you're a priest searching for metal.
3. It is forbidden to cross the great river and look at the "Palace of the Gods".
So option B. To go alone is not forbidden.
Hope it helps!
