The subordinate clause here is A, "as the layers of ash slowly compressed". Subordinate means that it cannot exist on its own, it has to be a part of the main, independent clause.
The hobbit put his the ring on waited till the gaurds where asleep and stole the key.
There should be a semicolon in between bill and the
Snowshoeing and snowmobiling are both popular activities in grand lake.
