Which one of these statements describes why, from a design perspective, a managed VPN approach for enterprise teleworkers is a most effective?

A.
A managed VPN solution uses a cost effective, on-demand VPN tunnel back to the enterprise

B.
This solution supports all teleworkers who do not require voce or video

C.
This architecture provides centralized management where the enterprise can apply security policies and push configurations.

D.
It provides complete flexibility for remote access through a wireless hotspot or a guest network at a host, in addition to a home office.

Explanation:

Here is the answer from the Cisco Certification guide.

Enterprise Teleworker Design
Enterprise teleworkers need to be differentiated from the occasional remote worker. The full-time enterprise teleworker has more extensive application access and requirements than the occasional remote worker. Occasionally, remote users connect to the corporate network at a hotspot, but generally they do not have the same application demands of an enterprise teleworker. Generally, enterprise teleworkers connect to a local ISP through a cable or DSL connection in their residence.’

The Cisco Virtual Office Solution for the Enterprise Teleworker is implemented using the Cisco 800 series ISRs. Each ISR has integrated switch ports that then connect to the user’s broadband connection. The solution uses a permanent always-on IPsec VPN tunnel back to the corporate network. This architecture provides for centralized IT security management, corporate-pushed security policies, and integrated identity services. In addition, this solution supports the enterprise teleworker needs through advanced applications such as voice and video. For example, the enterprise teleworker can take advantage of toll bypass, voicemail, and advanced IP phone features not available in the PSTN.

Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 7