A.
The narrator says that he had a lot of choices that were difficult to make, but he finally made the decision to leave the orphanage even though it was a tough choice. When he says that "<span>After all, my hate for my father was not so great and urgent as my hate for the orphan home" he shows that he hates living in the orphanage so much that he is willing to face his father just to get out. </span>
The correct answer is - (Before we left the camping grounds), we noticed a sign for the scenic trail.
An adverb clause functions the same way a simple adverb would - it describes the time, place, manner, etc. of the verb, of the action that is taking place. The only option that does this is C - <em>before we left the camping grounds </em>is an adverb clause which tells us when the action of <em>noticing a sign </em>happened.
Options A and B are adjective clauses; option D contains a noun clause.