You are designing an application that must meet the Windows Phone 7 application certification requirements. You need to ensure that the memory usage of the application meets the requirements. What should you recommend?

A.
If the ApplicationPeakMemoryUsage value returned by DeviceExtendedProperties is less than or equal to 90 MB, ApplicationCurrentMemoryUsage must be less than 64 MB.

B.
If the ApplicationPeakMemoryUsage value returned by DeviceExtendedProperties is less than or equal to 256 MB, ApplicationCurrentMemoryUsage must be less than 90 MB.

C.
If the DeviceTotalMemory value returned by DeviceExtendedProperties is less than or equal to 90 MB, ApplicationPeakMemoryUsage must be less than 64 MB.

D.
If the DeviceTotalMemory value returned by DeviceExtendedProperties is less than or equal to 256 MB, ApplicationPeakMemoryUsage must be less than 90 MB.