Which burger did Carl's Jr. collaborate with a famous chef to create?

The choice regarding the Teriyaki Burger with Gordon Ramsay is correct because it highlights a unique partnership that Carl's Jr. pursued to enhance their menu offerings. Collaborations with renowned chefs often aim to elevate the dining experience by infusing gourmet elements into fast-food products. Gordon Ramsay, known for his culinary expertise and television presence, was able to bring a distinct flavor profile and presentation to the Teriyaki Burger, appealing to both fans of gourmet cuisine and fast-food customers. Such collaborations not only serve to attract new customers but also emphasize the brand's commitment to innovation and quality in their menu items. The other options do not reflect any notable collaborations with celebrity chefs in the same way, focusing instead on staples or classic creations within the Carl's Jr. lineup.