Read the text and determine if the sentence is true (see options at the end):

Assassin's Creed is an action-adventure stealth video game developed by Ubisoft Montreal and published by Ubisoft. It is the first installment in the "Assassin's Creed" series. The game was released for PlayStation 3 and Xbox 360 in November 2007, and was made available on Microsoft Windows in April 2008.

Sentence: The only video game developed by Ubisoft Montreal and published by Ubisoft in 2007 was Assassin's Creed.
Choices:
[a]. Yes;
[b]. It's impossible to say;
[c]. No;
[b].