Final answer:
E-commerce is the practice that enables firms to conduct various business activities online, such as selling products and purchasing supplies, amplifying their outreach and efficiency globally.
Step-by-step explanation:
The correct answer to the question is B) E-commerce. E-commerce allows firms to sell products, advertise, purchase supplies, bypass intermediaries, track inventory, and eliminate paperwork. The rise of e-commerce is tightly linked to technological advancement and globalization, allowing for increased competition and enabling businesses as well as consumers to connect from all over the world. As communications technologies have improved, so have the opportunities for businesses to operate on a more efficient and international scale, exemplified by business-to-business marketplaces.