What should you do?

You are designing a Windows client application by using Microsoft .NET Framework 4.
You create a Global Positioning System (GPS) navigation application. Routing data is stored on a server. A wireless data connection that has limited bandwidth allows the application to download data from the server.
The application continuously shows a perspective view of the route ahead as a user sees it, based on the position and direction of the vehicle.
Prior to navigation, a user types their destination and selects a route they will follow.
You need to ensure that when the position or direction of the vehicle changes, the perspective view is updated immediately.
What should you do?
A. Download perspective views asynchronously as JPEG images when the user moves toward the route.
B. Compute the best route on the server. Download the selected routing data as geographic coordinates before the routing begins.
C. Compute all possible perspective views on the server, compress them as JPEG images, and download the images before the routing begins
D. When a wireless connection is available, compute potential routes from the current position of the car and store the corresponding routing data on the client application.

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