The following options are valid reasons for studying marketing:
- Marketing helps ensure that the things we buy are available when we need them.
- We are all consumers, so we should learn about buying and selling.
- Because marketing costs can be an important part of a product's price, we should know what we are paying for.
The second option, "Marketing provides a detailed breakdown of a company's bottom line," is less directly a reason for studying marketing itself, as it's more focused on financial analysis rather than the broader concepts of marketing.