Answer:
The answer is A
Explanation:
The first option conveys the same information as the original sentence, but is just less detailed.
The sirens would show themselves as beautiful mermaids, and they would sing of the sailors' greatest desires and offer them their greatest desires.
Because if they did then they might be found where they were hiding
Changed is the another word or synonym for wavered
Based on the given sentence above, I can say that it is a compound sentence. What makes this sentence compound is that, it consists of two independent clauses and are connected by a coordinating conjunction "so". Therefore, the answer for this would be the last option: two independent clauses.
