You have a hybrid Exchange Server 2016 organization. Some of the mailboxes in the research department are hosted on-prem

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You have a hybrid Exchange Server 2016 organization.
Some of the mailboxes in the research department are hosted on-premises. Other mailboxes in the research department are stored in Microsoft Office 365.
You need to search the mailboxes in the research department for email messages that contain a specific keyword in the message body.
What should you do?

A. From the Exchange Online Exchange admin center, search the delivery reports.
B. Form the on-premises Exchange admin center, search the delivery reports.
C. From the Exchange Online Exchange admin center, create a new In-Place eDiscovery & Hold.
D. From the Office 365 Compliance Center, create a new Compliance Search.
E. From the on-premises Exchange admin center, create a new In-Place eDiscovery & Hold.