Answer:
The author evaluates the effectiveness of different types of garden hose is the correct answer.
Step-by-step explanation:
In this case, the author shows that the effectiveness of a hose will also increase its demand and also the price. However, if the results are not good, the audience or public will show this by lowering the price of the product. There are different things that affect the prices, such as the working conditions, employment situations, and of course, taxes.