Which two actions should you perform?

You have a hybrid deployment of Exchange Server 2013 and Microsoft Office 365. The Exchange
Server organization has a mailbox size limit of 2 GB.
You need to provide engineers with the ability to retain certain email messages indefinitely. The
solution must meet the following requirements:
Ensure that the engineers can access the retained email messages by using Outlook Web App.
Ensure that the retained email messages do not apply to the mailbox size limit of the engineers.
Minimize the storage requirements of the on-premises servers.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose
two.)

A.
From Office 365, create Archive mailboxes.

B.
Instruct the engineers to create a personal folder.

C.
Create a retention policy.

D.
From the on-premises Exchange Server 2013 organization, create Archive mailboxes.

E.
Create a data loss prevention (DLP) policy.

Explanation:
C:

A:
In Exchange Server an archive mailbox is a second mailbox provisioned for a user that is separate to
their primary user mailbox.