Lambasta is a burger joint that claims to specialize in lamb burgers. Over the past year, Lambasta has experimented in different products wherein they stopped making some of their flagship lamb burgers and replaced them with chicken burgers. The Lambasta website, which claims Lambasta to be "the only legitimate lamb burger joint in town," increasingly provides special offers on their chicken burgers. Their core customer base and profits have steadily declined ever since. Which of the following types of positioning errors is affecting Lambasta?
a. Underpositioning
b. Overpositioning

In marketing, underpositioning refers to an error by a brand in which it doesnot have a proper understanding of its unique market offering and key benefits that it is providing to its customers. If a brand is underpositioning, it means that they are failing to paint a clear and unique picture of their brand in the minds of their customer. Here, Lambasta is a joint claiming to specialize in Lamb burgers, stops making lamb burgers altogether and shifts to chicken burgers. Consequently, this drops to a decrease in sales and profits because the customers are not attracted to the unique value of Lambasta ( which was providing lamb burgers) anymore.