You are the Office 365 administrator for your company. The company synchronizes the local Active Directory objects with

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You are the Office 365 administrator for your company. The company synchronizes the local Active Directory objects with a central identity management system.
The environment has the following characteristics:
✑ Each department has its own organizational unit (OU).
✑ The company has OU hierarchies for partner user accounts.
✑ All user accounts are maintained by the identity management system.
You need to ensure that partner accounts are NOT synchronized with Office 365.
What should you do?

A. Configure OU-based filtering by using Azure Active Directory Connect (Azure AD Connect).
B. In the Azure Active Directory portal, configure OU-based filtering.
C. Configure user attribute-based filtering by using Azure Active Directory Connect (Azure AD Connect).
D. In the Azure Active Directory portal, configure user attribute-based filtering.