Final answer:
Karla can use advertising to educate her consumers about the differences between her store and competitors, protect her consumer base, and potentially increase the perceived value of her products, although acquiring a large market share is unlikely.
Step-by-step explanation:
Karla, who owns a monopolistically competitive firm, can realistically achieve several objectives if she decides to advertise her business. First, advertising will allow Karla to educate her consumers about the unique qualities and differences between her store and her competitors. This can help to differentiate her products in the market. Also, advertising could serve to protect her consumer base by reinforcing brand loyalty and reminding customers of her products' benefits. However, outright taking over a large market share is challenging in a monopolistic competition due to the presence of many competitors and ease of entry into the market. While advertising may not necessarily lower costs or make her store more efficient, it can effectively increase the perceived value of her offerings, which can lead to a larger consumer following or allow for a higher pricing strategy.