Which linguistic principle was the primary driver behind Google's 1998 rebranding from its original name 'BackRub' to better position itself in the global market?

In the world of language and linguistics, branding decisions can make or break a company's identity. Some of the most successful brands have carefully crafted their names using linguistic principles to create memorable, globally-appealing identities. This poll tests your knowledge of a famous linguistic rebranding case study that revolutionized how language experts approach corporate naming strategies. Can you identify which linguistic principle drove this major company's rebranding success?

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Phonological optimization (using the mathematical term 'googol' modified for easier pronunciation and memorability across multiple languages)
Morphological simplification (reducing a complex phrase 'back-routing mechanism' to a single morpheme for brand efficiency)
Semantic transparency (choosing a name that literally described the search function in multiple languages)
Etymological authenticity (reverting to the original Sanskrit term 'guhaka' meaning 'to search' as the foundation for the brand)