The anser is D: compound. A compound sentence is when two or more independent clauses that have related ideas are joined with a coordenator (for, and or but) or a semicolon. Independent clauses can stand alone as a complete thought. They are not dependent of one another to express a complete thought, but they join similar ideas.
The best answer in my opinion is the third choice.
The answer would be, The ship watched Icarus fall
Which book is this, so i can read and help
