Do I still need original diablo 3 to play reaper of souls?

I'm planning to buy Diablo 3 game, and I was just wondering, because I found two diablo's basically, the original and Reaper of souls.

My question is :

Do I still need original diablo 3 to play reaper of souls? In other words, should I buy the two editions, or will the reaper of souls also contain the diablo game base. Thank you!

diablo-3

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What is the difference between Diablo 3 Reaper of Souls and Ultimate Evil Edition?

The Ultimate Evil Edition is filled with all the features, fast-paced action, and legendary loot included in the Reaper of Souls expansion set, as well as all of the content of the original Diablo III.

Does Diablo 3 Battle Chest include Reaper of Souls?

The Battle Chest includes both Diablo III and the Reaper of Souls expansion, together at last in one definitive volume.

Is Diablo 3 Starter Edition the full game?

Plus, online D3 Character Profiles coming soon. You'll be able to try Blizzard's long-awaited new game Diablo 3 without having to buy it. This will be done via a Starter Edition of the game downloadable from Battle.net.

Is Diablo 3: Reaper of Souls Worth Buying?

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