One of the big challenges with cloud-based reputation checks is performance. Users do not typically want to wait a few seconds while the reputation of potential URLs is checked. Most of us have come to expect that websites are at the immediate tips of our fingers and that access and loading of the content should take place rapidly and immediately. This presents a tricky security problem. Since the reputation service exists in the cloud, the challenge can be summed up as, "How can a reputation be securely retrieved without slowing Web access down so much as to create a poor user experience?"

By using a cloud based reputation services capable of providing patented attributes for use by commercial mobile security products.

Explanation:

By using such reputation services, the reputation services is shielded from being open to users and must have access restriction thereby ensuring that users do not experience poor service. Also, it is important to base security decisions on the objectives to be fulfilled by the security. It is also necessary for these protection to come with network and host hardening alongside the necessary management security capabilities to ensure smooth user experience.

i believe the answer would be b. within an intersection or on a crosswalk. hope this ! : )