You are responsible for performance testing for a new hybrid mobile application that will run on smartphones. The applic

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You are responsible for performance testing for a new hybrid mobile application that will run on smartphones. The application will use the phone's GPS capability to determine the altitude of the phone. This information will be used to send information to the user indicating the change in their "safe limit" for alcohol consumption. You expect your highest usage of the system to be on New Years Eve when many people are skiing at high altitudes and will need to check their safe limit. For the first year of usage, 5,000 concurrent users are expected to use the application on that one evening.
Given this information, what is the best approach to use for conducting the performance test?

A. Clone simulators to create 5000 users and conduct the test with those simulators
B. Clone emulators to create 5000 users and conduct the test using the emulators
C. Use a mix of simulators and emulators to give the most realistic results
D. Use crowd-sourcing and real users to get accurate results from real devices