Concept:E-commerce refers to commercial transactions conducted through digital platforms.
Explanation:A buyer and seller in different countries need an online channel designed for trade.
E-commerce supports product listing, payment, and delivery coordination across borders.
E-portal mainly acts as an entry point or gateway to websites and services.
E-library provides access to digital books and academic resources.
Podcasting distributes audio or video episodes for entertainment and education.
None of these other channels are meant for commercial buying and selling.
Therefore, e-commerce is the correct digital channel for business transactions between Nigeria and Ghana.
Answer:C. e-commerce