Answer:
a) comparative advertising
Step-by-step explanation:
The given scenario exemplifies Comparative Advertising. It is a marketing strategy in which a product or service of a particular company is presented as superior when compared to a competitor's in terms of price, quality, etc. It may involve printing a side-by-side comparison of the features of a company's products next to those of its competitor as here Olivia listed the prices of various services that she offered as well as the prices charged by two other salons in the area for the same services.