Answer: The second one is rope
Explanation:
it sounds the best compared to the others.
Either the 2nd or third one would work because you just want the two sentence to become one and so by putting either a comma or ; there then you could make one sentence clear.
It would be letter a, since an interrogative sentence is question. Since the first answer is the only one with a question mark, the answer is a.
I believe the answer is B. Compound Sentence.
Hope this helped!