Network integration helps to build a powerful business foundation. Which approach does Ciscouse to integrate applications and services across the network infrastructure？（）

A. Cisco Catalyst 2900 Series，Catalyst 7300 Series，and Catalyst 8000 Series
B. Cisco Catalyst 2900 Series，Catalyst 3700 Series，and Catalyst Series
C. Cisco Catalyst 2700 Series，Catalyst 7300 Series，and Catalyst 8000 Series
D. Cisco Catalyst 2700 Series，Catalyst 3700 Series，and Catalyst4500 Series

A. Cisco Catalyst switches
B. Cisco SOHO routers
C. Cisco 7000 Series WAN edge routers
D. Cisco integrated Services Routers