Scenario: A Citrix Engineer wants to configure a NetScaler Gateway with two-factor authentication within a new XenMobile deployment while providing users with
the benefits of single sign-on to the existing XenApp and XenDesktop resources. The engineer configured a Public Key Infrastructure (PKI) for other components in
the environment already and would like to use the same PKI.
Which two types of authentication policies will the engineer need to add to the NetScaler Gateway virtual server? (Choose two.)

A.
LDAP

B.
Certificate

C.
Radius

D.
TACACS