The only conjunction in this sentence is C) but.
All of the other options are prepositions, not conjunctions.
Answer:
“after he had waited an hour" is the subordinating clause and it's a dependent clause.
Explanation:
Did you see the movie The Lord of the Rings? Most people know that it's based on J.R.R. Tolkien's book. But few realize, that by day, Tolkien was a professor of ancient languages. He led a very normal life as a college professor, preparing lectures and grading papers. He loved to write. However, and in his spare time at night, he escaped to a world of hobbits, elves and other creatures. In 1937, he published The Hobbit. Then, he wrote the three novels that are known together as The Lord of the Rings. It took him twelve years. Have you ever seen the three books in one volume? If so, you know how much work Tolkien put into creating his fantasy world. Actually, it's surprising that it took him only twelve years.
Answer:
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