Runako Wants to Build a Social Networking Website and Host

Runako wants to build a social networking website and host it using a PaaS provider. The social networking website will have users posting and sharing large quantities of media such as videos and images. He is currently evaluating the storage options that the app will need. Which of the following storage options should Runako use and why?

A) Block storage, because it is less expensive than object storage
B) Object storage, because it allows a Web app to directly store objects
C) Persistent volume, because it is faster than block storage
D) Block storage, because it is faster than object storage