Despite a lengthy investigation into the matter, officials were still

Question

Despite a lengthy investigation into the matter,  officials were still unsure who's bag was left unattended in such a suspicious location.

A.officials were still unsure who's bag was left unattended

B.officials are still unsure who's bag was left unattended

C.officials were still unsure who's bag was being left unattended

D.official's were still unsure who's bag was left unattended

E.officials were still unsure whose bag was left unattended

asmba · Answer

Answer - E  as "whose" shows possession while who's can be "who is" or "who has"

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