,__ goal is to create a culture of hand washing with soap.选哪个?为什么?October 15th,2008 is the first Global Hand Washing Day,__ goal is to create a culture of hand washing with soap.A. of which B.whose C.when D.on which

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,__ goal is to create a culture of hand washing with soap.选哪个?为什么?
October 15th,2008 is the first Global Hand Washing Day,__ goal is to create a culture of hand washing with soap.
A. of which B.whose C.when D.on which

B whose goal=the hand washing day's goal

A. of which