Which of the Following Statements A), B) or C) Is

Which of the following statements a) , b) or c) is false?

A) PubNub is a pub/sub service geared to real-time applications in which any software and device connected to the Internet can communicate via small messages.
B) Some common PubNub use-cases include IoT, chat, online multiplayer games, social apps and collaborative apps.
C) PubNub provides several live streams for learning purposes, including one that simulates IoT sensors. One common use of live data streams is visualizing them for monitoring purposes.
D) All of the above statements are true.