What Is the Recommended Number of Physical Network Interfaces in a Mobile

What is the recommended number of physical network interfaces in a Mobile Access cluster deployment?

A) 4 Interfaces - an interface leading to the organization, a second interface leading to the internet, a third interface for synchronization, a fourth interface leading to the Security Management Server.
B) 3 Interfaces - an interface leading to the organization, a second interface leading to the Internet, a third interface for synchronization.
C) 1 Interface - an interface leading to the organization and the Internet, and configure for synchronization.
D) 2 Interfaces - a data interface leading to the organization and the Internet, a second interface for synchronization.