Before Elon Musk announced change of the signature Blue Bird logo to Sign X' logo, who is regarded as the creator of Twitter's iconic Bird in its final version in 2012?

Correct option is B

Martin Grasser is recognized as the creator of Twitter's iconic Bird logo in its final version in 2012. This design marked a significant moment in the visual identity of Twitter, symbolizing simplicity, elegance, and the ability to communicate across barriers without using words.
 Grasser, as a graphic designer, played a pivotal role in refining the logo to its most minimalistic form, ensuring that it would be instantly recognizable and adaptable across various platforms and sizes.
 His contribution to Twitter's branding is a testament to the power of design in creating a universal symbol for digital communication platforms.