How Did Apple Trump Google to Become the Dominant Mapping

Multiple Choice

How did Apple trump Google to become the dominant mapping platform on iOS?

A) Apple's control of iOS gave it control of the distribution channel to reach its users, kicking Google out as the default mapping app and capturing the majority of user engagement.
B) Apple sued Google for copyright infringement related to the look and feel of Apple Maps.
C) Apple sued Google for privacy violations related to the collection of map data.
D) Apple hasn't trumped Google Maps. Google's Map app is used by the majority of iOS customers, whereas most users ignore Apple Maps.