What is the genre of World of Warcraft?

MMORPG - Massively Multiplayer Role-Playing Online Game
RTS - Real Time Strategy
Casual
Collectible Card Game

Info: Massively multiplayer online role-playing game or MMORPG is a computer game in which the two genres of role-playing games and mass online games are combined in one. The main feature of the genre is the interaction between a large number of players within the virtual world.

About this trivia

Trivia about "World of Warcraft" game, sometimes also called WoW, is a global multiplayer online role-playing game (MMORPG) developed by Blizzard Entertainment, which gave life to the Warcraft universe. In 2008, World of Warcraft counted more than 11.5 million subscribers and to this day is included into the Guinness Book of Records as the world's most popular and largest MMORPG.