Answer:
A. The definition of a market in determining the price elasticity of demand.
Step-by-step explanation:
Price elasticity of demand is the height of responsiveness of demand or purchase to changes in price. It shows how consumers or buyers would react to the demand for a product when the price of their favourite brand increases.
Reaction of consumers in the market place is one of the determinants of price elasticity of demand. It tells how buyers will switch to different brand of products if the price of their favourite brand increases. It also shows how consumers will adjust their spending abilities if the price of all the brands are increased at the same time.
Alternatively, consumers would demand for the brand that falls within the limit of their spending.