Why Content Provider Networks may choose to implement their own network?

Group of answer choices

Because by using their own network, they can reduce the number of servers to service the same volume of content to the users.

Because Tier$-1$ ISPs only provide critical connectivity and filter out intense content data and that disables content providers to use ISPs to provide their service.

Because they need to use core network to deliver their content to their users and building their own network may save them money they would otherwise pay ISPs.

Because they need to store their content in the core routers of the network, therefore they have to own some routers.