Hello there!
Your question asks what answer choice best describes what a customer expects when purchasing a product.
Answer: A). Brand promise
The reason why answer choice "A). Brand promise" would be the correct answer because this is what customers expect when they buy a product.
Brands like to give advertisements that promise the consumers that they will enjoy their product and will not regret buying it, and that's what customers expect when they buy and use the product
Brand promise is a "saying" or "statement" that a company/brand makes about their products that a customer will expect to experience when they have the product. It's more so like a slogan.
For example, Geico says that customers can save 15% or more on car insurance from them. This means that customers would expect to save 15% or more on car insurance if they choose Geico.
I hope this helps!
Best regards,
MasterInvestor