Final answer:
Whataburger began using ketchup tubs in 2011, which is not listed among the options. These tubs are now a recognizable part of the Whataburger dining experience.
Step-by-step explanation:
The year Whataburger began using ketchup tubs was 2011. While the options provided in the question do not include 2011, it is the actual year Whataburger switched to the current fancy and spicy ketchup tubs. The unique ketchup tubs have become a staple for the brand, and many customers look forward to the convenience and the taste that these ketchup offerings provide.