Assuming <SDK-Path> refers to the installation path of Android SDK, which of the following
is the correct
installation path for Google Play Billing Library?

A.
<SDK-Path>\android-sdk\extras\play_billing

B.
<SDK-Path>\android-sdk\extras\google\play_billing

C.
<SDK-Path>\android-sdk\google\play_billing

D.
<SDK-Path>\android-sdk\extras\google\billing