Which airline famously incorporated a 'Speedmark' symbol into its logo redesign in 1997, replacing its previous triangular 'Delta' symbol that had been used since 1959?

In the competitive transportation industry, brand identity plays a crucial role in customer recognition and loyalty. Over decades, many transportation companies have evolved their visual identities to stay current while maintaining their heritage. This trivia question focuses on a significant logo transformation from a major transportation brand. Test your knowledge of transportation branding history!

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British Airways
Lufthansa
Singapore Airlines
Qantas