The cisco telepresence portfolio provides industry-leading video-conferencing solutions , how does the Cisco acquisition of tandberg strengthen its position？（）

• A、it will give cisco products A strategic advantage by providing privileged access to the TIP
• B、it enables cisco to eliminate product redundancies and improve margins
• C、it provides cisco with its first high-end telepresence offering
• D、it allows cisco to quickly broaden its product portfolio to better serve customer needs