What is a difference between OpenConfig and native YANG data models?

What is a difference between OpenConfig and native YANG data models?
A . Native models are developed by vendors and designed to intergrate to features or configurations that are relevant only to that platform.
B. openconfig models are developed by venders and designed to integrate to features or configurations that are relevant only to that platform.
C. Native models are designed to be independent of the underlying platform and are developed by vendors and standards bodies, such as the IETF.
D. Native models are developed by individual developers and designed to apply configurations on platforms.

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Answer: A