What is the benefit of metadata API compared to Salesforce app exchange packaging?

Answer options:

A.Metadata API make it simpler to set up metadata
B.It is more convenient to transfer customizations from test or sandbox to product organizations
C.Metadata API takes fewer space
D.App Exchange packaging doesn’t contain information regarding sites while Metadata API can.

Correct Answer: B 
Using Metadata API is more convenient to transfer customizations from test or sandbox to product organizations 
Other Options are incorrect because Metadata API is not trusted as App Exchange, and the code is not safe since it is editable. In addition to this Salesforce won`t help you much regarding that app as its not listed on their store. It is nothing more than an implementation. No partner benefits. 
References:

https://help.salesforce.com/articleView?id=package_distribute_apps_overview.htm&type=5

Correct Answer: B 
Using Metadata API is more convenient to transfer customizations from test or sandbox to product organizations 
Other Options are incorrect because Metadata API is not trusted as App Exchange, and the code is not safe since it is editable. In addition to this Salesforce won`t help you much regarding that app as its not listed on their store. It is nothing more than an implementation. No partner benefits. 
References:

https://salesforce.stackexchange.com/questions/157474/appexchange-app-vs-metadata-api

Correct Answer: B 
Using Metadata API is more convenient to transfer customizations from test or sandbox to product organizations 
Other Options are incorrect because Metadata API is not trusted as App Exchange, and the code is not safe since it is editable. In addition to this Salesforce won`t help you much regarding that app as its not listed on their store. It is nothing more than an implementation. No partner benefits. 
References:

https://trailhead.salesforce.com/en/content/learn/modules/isv_app_development/isv_app_development_packaging