1,4,6,?,11,14,16
the difference is going
3,2,?,?,3,2
therefore it should be
Its subject matter makes it similar to a nocturne.
Hope that has help it the best way i can explain it
Out of your 3 possible answers, B. ones' is the correct one and I will explain why. Answer A is a contraction of one and is. When you put "one is" into the blank space you can tell that it is not right. Answer C is incorrect because when you place an apostrophe after an s it is implied that there should be another s that follows and so you do not need to put it there. This means that answer B is correct since it doesn't have the extra s.