Which VMware Single Sign-On component handles STS authentication requests?

A.
Security Token Service

B.
Administration Server

C.
VMware Directory Service

D.
Identity Management Service

Explanation:

Reference: https://pubs.vmware.com/vsphere-60/index.jsp?topic=%2Fcom.vmware.vsphere.install.doc%
2FGUID-90C1E3DC-4397-4BF0-808E-DF3802E56BC6.html