Final answer:
Momentum buying is erroneously described in the question. The correct concept is 'tying sales', a strategy where customers must buy a second product to have the option to buy the first. Tying sales can limit consumer choice and result in undesired purchases, contrasting bundling, which can be beneficial.
Step-by-step explanation:
The concept described by the student, known as 'momentum buying', is not entirely accurate. Instead, the scenario provided is more representative of a controversial sales strategy called tying sales, which occurs when a customer is only allowed to purchase one product if they also buy another, often unrelated, product. This can be disadvantageous and limit consumer choice. For instance, being forced to buy a specific portable TV model when purchasing a popular DVD limits the consumer's options and may result in a purchase that isn't truly wanted or necessary. On the other hand, bundling is a related yet distinct concept where products or services are combined to provide a better price deal for consumers, like cable companies offering packages for internet, TV, and phone services. Both tying sales and bundling can impact consumer behavior and choices.