Which three of the following statements correctly describe the Cisco router portfolio?

All Cisco ISR G2 routers provide network automation, consolidated VPN, and security features.

The Cisco 800 and 1900 router series both offer entry-level application optimization features.

The Cisco 1900, 2900, and 3900 router series provide video and collaboration features.

The Cisco 2900 and 3900 router series support Cisco UCS Express.

The Cisco 1900 router series supports Cisco Unified Communications Manager Business Edition 6000.