Answer:
simple
Explanation:
A simple sentence contains one independent clause with a subject and a predicate. Besides, it makes sense on its own and does not possess any dependent clauses. Thus, even though the subject <em>Joe King</em> is followed by an appositive phrase which identifies him -<em>an engineering professor from California</em>- the sentence still has one single independent clause consisting of a subject and a predicate.
The action of Schaffer dismissing the sighting of smoke caused the fire to grow, for he did not bother to alert anyone else. Neither did he try to do something about the fire.
The only preposition in the options available to you is of, so the correct answer is C.
A) and B) are conjunctions.
D) is an adverb.
