Which statement is true about the installation of Virtual Infrastructure Web Access?

Which statement is true about the installation of Virtual Infrastructure Web Access?

A.
It is always installed on VirtualCenter and is optional on ESX Server.

B.
It is optional on both ESX Server and VirtualCenter.

C.
It is always installed on ESX Server and VirtualCenter.

D.
It is always installed on ESX Server and is optional on VirtualCenter.

Explanation:
ESX Server 3 Installation Guide ESX Server 3.5 and VirtualCenter 2.5, page 14, 81,
83-92
A browser lets you download the VI Client from the VirtualCenter Server or ESX Server
hosts. When you have appropriate login credentials, Web Access also lets you perform
limited management of your VirtualCenter Server and ESX Server hosts.
The VMware ESX Server 3.5 installation includes the following components:
VMware ESX Server – Software to manage and serve virtual machines.
VMware VI Web Access – Software to allow Web browser access to the ESX Server host
Note there is no option to deselect the VMware VI Web Access component during the
installation, so it is always installed on ESX Server.