【单选题】
You are designing an Active Directory implementation strategy to present to executives from your company and from Contoso， Ltd. <br /> Which implementation strategy should you use？（）
A、 Upgrade the New York domain. Upgrade the Chicago domain. Create a pristine forest for Contoso， Ltd.
B、 Create a pristine forest. Upgrade the New York domain. Upgrade the Chicago domain. Do nothing further.
C、 Create pristine forest. Upgrade the New York domain.Upgrade the Chicago domain.Create a pristine forest for Contoso， Ltd.
D、 Create a pristine forest.Upgrade the New York domain. Upgrade the Chicago domain.Create a new child domain for Contoso， Ltd.
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