In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.
Q: Question: How long had Ubisoft been in business when they published The Settlers: Rise of an Empire? Passage:The Settlers: Rise of an Empire () is a city-building game with real-time strategy elements, developed by Blue Byte and published by Ubisoft. Released for Microsoft Windows in September 2007, it is the seventh game in The Settlers series. In March 2008, Blue Byte released an expansion, The Settlers: Rise of an Empire - The Eastern Realm (), featuring new single-player campaign missions, new maps for both single-player and multiplayer modes, and an enhanced map editor. In September, they released The Settlers: Rise of an Empire - Gold Edition, containing the original game plus the Eastern Realm expansion, and additional single and multiplayer maps. The Gold Edition was also released on Steam and Uplay. In 2015, it was released on GOG.com, and in 2018, it was re-released as The Settlers: Rise of an Empire - History Edition.
Links: a. Ubisoft b. GOG.com c. Ubisoft Blue Byte d. City-building game
A:
a