Develetech has implemented a service that allows programmers to post documentation and other updates. now, anyone who signs up for the service will receive that content automatically via a feed or even email.
what is this type of service called?

Publisher subscriber service(pubsub service)

Explanation:

A publisher subscriber service is a service where publisher can publish the content and subscriber who subscribes the service will get notifications about the content being published

i prefer xbox one. : )

i think the answer is b.