which groups should you add ExchangeAdmin?

You have an Exchange Server 2013 organization that contains 20 servers.
You plan to deploy Exchange Server 2013 RTM Cumulative Update 1 (CU1) to the first Exchange
server in the organization.
You need to ensure that a user named ExchangeAdmin can deploy CU1 to the first server, The
solution must minimize the number of permissions assigned to ExchangeAdmin.
To which groups should you add ExchangeAdmin?

A.
Schema Admins, Domain Admins, and Enterprise Admins

B.
Schema Admins, Domain Admins, and Delegated Setup

C.
Domain Admins and Organization Management

D.
Enterprise Admins and Organization Management