The answer would be A. whose
B. who's would not make sense in this situation because who's is a contraction which means 'who is'. If that was to be used in the answer, the sentence would be, "Margaret wants to knwo<em> who is</em> bike this is," which makes no sense whatsoever
Whose shows possession
Hope my answer helped! :)
Amanda's dreams for her childen
Answer:
I been wondering the same thing
Explanation: