What Is Meant When Individuals Refer to 'The Cloud

What is meant when individuals refer to 'The Cloud'?

A) It is the name of the company who current has the monopoly on Internet-based storing services
B) It is a phenomenon where individuals can go online and chat with other netizens from around the world
C) It is a method where data can be stored on an external server and accessed from other locations through the Internet
D) It is a common colloquialism where someone's attention is diverted from situations and events happening around them