Which statement best defines 'e-commerce'?

• A. The exchange of goods and services in physical stores
• B. Online interactions that focus on social networking
• C. Buying and selling conducted online through websites
• D. Marketing done solely through digital ads

Answer: (C)

The statement that best defines 'e-commerce' is the one that describes buying and selling conducted online through websites. E-commerce encompasses a wide range of online transactions, where businesses and consumers engage in the exchange of goods and services over the internet. This includes various activities such as online retail shopping, electronic payments, and even digital marketplaces where various vendors can sell their products.

In the context of the other options, while physical stores involve the exchange of goods and services, they do not fall under the definition of e-commerce, which is focused on online transactions. Social networking interactions, although valuable for promoting businesses, do not specifically pertain to the direct buying and selling processes of goods or services. Lastly, marketing through digital ads is a component of online sales strategies but does not encompass the entire scope of e-commerce, which is fundamentally about completing sales online.