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Which of the following is not true about the subscription monetizing technique?

A.

It works by offering your application for free but charging a monthly payment for the service being offered by the application.

B.

It works by offering your application as paid application for minimum amount and charging a monthly payment for the service being offered by the application.

C.

It works by offering your application for free but charging a yearly payment for the service being offered by the application.

D.

It works by allowing the user to pay once for the application download, then the user gets free updates.

Which of the following is valid usage of Google Play Licensing Service? (Choose two)

A.

Verify user has paid for an application.

B.

Allows an application to install APK extensions.

C.

Add encryption to communication between your application and the internet.

D.

Improve the application performance and decrease memory usage.