Concept:A compound sentence has two or more independent clauses joined by a coordinating conjunction like "and," "but," or "or.Explanation:Option D has two independent clauses: "The servant ran away" and "added to their troubles." They are joined by "and."Option A starts with a phrase, not a clause. Option B begins with a participle phrase, making it simple. Option C uses "because" to connect an independent clause with a dependent clause—this is a complex sentence.Only option D contains two equal clauses connected by "and," so it is a compound sentence.Answer:D. The servant ran away and added to their troubles.